Electric Bikes - Question for anyone who has the celllog 8s monitor

Is the alarm very loud? I'm planning on buying 2 of them and probably putting them right below my seat.

Talking about this monitor
http://hobbyking.com/hobbyking/store/catalog/CellLog-8M.jpg

Is the alarm very loud? I'm planning on buying 2 of them and probably putting them right below my seat.

Talking about this monitor
http://hobbyking.com/hobbyking/store/catalog/CellLog-8M.jpg

Morph,

I have the original CellLog 8S, which logs. I have no problems hearing the alarm in my house when charging (I have yet to discharge the cells low enough to trigger the LV alarm). The good news is that the CellLog comes with a wire that you can wire to a piezo buzzer and then plug into the unit to amplify the sound of the alarm. (Piezo buzzers are small and inexpensive and if you have a Radio Shack nearby, you can probably pick one up there.) If you have e-brakes, you can also wire the CellLog to perform LVC and not have to rely on the audible alarm. I love the CellLog--it's very versatile. One mod you will need to make to ensure that you don't get cells 7 and 8 out of syn is to solder a small copper wire on the board (the company is aware that with larger packs all power for the CellLog is drawn from cells 7 and 8 but they don't seem inclined to remedy this situation because the soldering fix for larger packs makes the unit not function with 2-cell packs). The copper wire that is soldered to fix the issue is circled in green. All kudos for this fix goes to SpeedEBikes over at Endless Sphere.

http://static.rcgroups.com/forums/attachments/2/7/9/8/6/0/a2971435-119-modded%20cellog8.jpg?d=1262705357

Everyone who bought Thundersky batteries, make sure you check your battery cells voltage each time you charge them. I had a weak cell and for some reason, it didn't charge all the way with the rest of the batteries. It's still a good cell but for some reason it didn't charge. It's charging right now. It's at about 3.45v now.

nwmtnbkr (http://www.bikeforums.net/member.php?169969-nwmtnbkr) ,

Can you tell me everything you bought for your celllog monitor and where you bought it, including the piezo alarm? How hard was it to install the piezo alarm? I don't have a soldering iron. Did you need any wires to connect to the cells or did wires come with it? Thanks.

My next project is the helmet with the sound system and cam, so an audible alarm had better be loud. I like this... Actually, the next is a wireless USB hub and a netbook. This sounds easy tho....

A buzzer in the helmet, hmmmm

nwmtnbkr (http://www.bikeforums.net/member.php?169969-nwmtnbkr) ,

Can you tell me everything you bought for your celllog monitor and where you bought it, including the piezo alarm? How hard was it to install the piezo alarm? I don't have a soldering iron. Did you need any wires to connect to the cells or did wires come with it? Thanks.

Sorry to be responding so long after you posted the question, morph. I didn't see it until CowTowPeddler bumped the thread with his post. I bought my CellLog 8 from EPBuddy in the US. It was actually cheaper than ordering from Hobby King, once I added the postage charge from Hong Kong. Plus, I got my unit from EP Buddy in about 4 days. The original CellLog 8 that is capable of logging comes with a mini-USB cable so you can hook the CellLog 8 to your computer to download data about the cells of your battery under load, a pair of mini-alligator clips so you can measure the voltage of individual cells and a CD with LogView software and the CellLog manual. You have to buy the cable to connect the 8 cells. I ended up ordering a cable harness off e-bay for $13, with free shipping. It's gone up by a $1.50 and is now $14.50, but shipping is still free. http://cgi.ebay.com/Chargery-Power-DB8-8S-40cm-Balance-Charge-Leads-/270470253072?cmd=ViewItem&pt=Radio_Control_Parts_Accessories&hash=item3ef9488a10 It is very well made and if you have an iCharger 208 or 110, you can use the banana plugs to connect to the charger. I cut off the banana plugs and wired an XLR chasis connector to be able to use my 3-stage, 24V smart charger.

I'm extremely happy with my CellLog. Not only does provide the functionality of a BMS, I can look at data of the cells under load in a variety of formats to determine the health of my battery pack. It's worth every penny.

Oh, and I forgot to mention that I haven't installed a piezo alarm yet. My alarm sounded once while I was climbing a steep, unimproved forest road and I heard it clearly. However, you ride in an urban environment so a piezo alarm might be needed. (I forgot to mention that an alarm wire is included with the CellLog unit.) I have my CellLog in a metal case that is attached to the case I built for my batteries. I intentionally used a case for the CellLog that is large enough to house a 1-inch piezo as well.

147661

Sorry to be responding so long after you posted the question, morph. I didn't see it until CowTowPeddler bumped the thread with his post. I bought my CellLog 8 from EPBuddy in the US. It was actually cheaper than ordering from Hobby King, once I added the postage charge from Hong Kong. Plus, I got my unit from EP Buddy in about 4 days. The original CellLog 8 that is capable of logging comes with a mini-USB cable so you can hook the CellLog 8 to your computer to download data about the cells of your battery under load, a pair of mini-alligator clips so you can measure the voltage of individual cells and a CD with LogView software and the CellLog manual. You have to buy the cable to connect the 8 cells. I ended up ordering a cable harness off e-bay for $13, with free shipping. It's gone up by a $1.50 and is now $14.50, but shipping is still free. http://cgi.ebay.com/Chargery-Power-DB8-8S-40cm-Balance-Charge-Leads-/270470253072?cmd=ViewItem&pt=Radio_Control_Parts_Accessories&hash=item3ef9488a10 It is very well made and if you have an iCharger 208 or 110, you can use the banana plugs to connect to the charger. I cut off the banana plugs and wired an XLR chasis connector to be able to use my 3-stage, 24V smart charger.

I'm extremely happy with my CellLog. Not only does provide the functionality of a BMS, I can look at data of the cells under load in a variety of formats to determine the health of my battery pack. It's worth every penny.

I am hoping to mount a pair of the CellLog 8s on my handle bar so I would need really long wires because of this I would prefer to use lighter gauge wiring. I am thinking of something in the 22 gauge so I can run 16 wires without being very noticed. I know you like your cable system but for me I don't think it would work well unless I cut and patch wire into it. D oyou know of anywhere I can buy the connector ends with wire clips so I can make my own?

I am hoping to mount a pair of the CellLog 8s on my handle bar so I would need really long wires because of this I would prefer to use lighter gauge wiring. I am thinking of something in the 22 gauge so I can run 16 wires without being very noticed. I know you like your cable system but for me I don't think it would work well unless I cut and patch wire into it. D oyou know of anywhere I can buy the connector ends with wire clips so I can make my own?

You need to buy JST-XH 9-pin connectors (be careful not to buy those used by toy train hobbyists--they're too small). You'll also need a special crimping tool for this connector. You can buy the JST 9-pin connectors from digi-key.com. Here's a link for the specific connector you'll want to get. http://search.digikey.com/scripts/DkSearch/dksus.dll?WT.z_header=search_go〈=en&site=us&keywords=455-2217-ND&x=12&y=26 (http://search.digikey.com/scripts/DkSearch/dksus.dll?WT.z_header=search_go&lang=en&site=us&keywords=455-2217-ND&x=12&y=26)

Thanks for the info. So they definately require 9 pins? I assume 8 positive and one neutral.

Thanks for the info. So they definately require 9 pins? I assume 8 positive and one neutral.


Here you go. You'll get this diagram in the owner's manual too, which is on a CD included with the CellLog.

http://pic50.picturetrail.com/VOL442/7447283/15664551/384369753.jpg

I have 8 of my cables connected to negative terminals and 1 to a positive terminal. I also have the charging leads on my wiring harness wired to an XLR chasis plug and hook my 24V smart charger to it to charge my battery (with the CellLog 8 connected to sound the alarm once the battery is charged to the proper level).

http://pic50.picturetrail.com/VOL442/7447283/15664551/384975140.jpg

I forgot to add that it's important that you get your cables hooked up in sequential order so I'd suggest you number them. The harness I bought has all the cables numbered, which is very helpful when you have nine of them.
148024

Here you go. You'll get this diagram in the owner's manual too, which is on a CD included with the CellLog.

http://pic50.picturetrail.com/VOL442/7447283/15664551/384369753.jpg

I have 8 of my cables connected to negative terminals and 1 to a positive terminal. I also have the charging leads on my wiring harness wired to an XLR chasis plug and hook my 24V smart charger to it to charge my battery (with the CellLog 8 connected to sound the alarm once the battery is charged to the proper level).


Great info thanks mucho. Are you also still using your old SLA 24v charger from Currie or ??

I forgot to add that it's important that you get your cables hooked up in sequential order so I'd suggest you number them. The harness I bought has all the cables numbered, which is very helpful when you have nine of them.
148024

One last question (for now). Your not leaving your cellLog connected 24/7 are you? I am assuming your unpluging it when not riding or charging. Correct?

One last question (for now). Your not leaving your cellLog connected 24/7 are you? I am assuming your unpluging it when not riding or charging. Correct?

That's correct, I only have it plugged in when I'm riding or charging. I'm very happy with it's performance and don't see the need to have BMS with the CellLog on board. I hope you're getting at least one unit that logs. I think it's invaluable to have the log data showing how each cell performs while under load. When I build my second LIFEPO4 pack, I may get the scaled down CellLog without logging since I have this one that does log.

That's correct, I only have it plugged in when I'm riding or charging. I'm very happy with it's performance and don't see the need to have BMS with the CellLog on board. I hope you're getting at least one unit that logs. I think it's invaluable to have the log data showing how each cell performs while under load. When I build my second LIFEPO4 pack, I may get the scaled down CellLog without logging since I have this one that does log.

Yeah, when I get around to it I will likely order 2 of the logging CellLogs. I'm guessing I'll do a few logs in the beginning and not again until (if) I have a problem. What are you using for charging now? It sounds like your mass charging with a 24v charger without a BMS as I do and using the CellLog to check for a hight cell.

Yeah, when I get around to it I will likely order 2 of the logging CellLogs. I'm guessing I'll do a few logs in the beginning and not again until (if) I have a problem. What are you using for charging now? It sounds like your mass charging with a 24v charger without a BMS as I do and using the CellLog to check for a hight cell.

I bought a 3-stage, 24V smart charger that I will also use on my SLA pack periodically. The nice thing about the CellLog is that you can use their default settings for individual cells and overall pack voltage for charging and discharging or create your own custom settings. So far, my cells are staying in close alignment. Since I'm still breaking in my LIFEPO4 pack, I'm logging every ride and saving the data to compare the cells under load in different topologies (everything is hilly here, but some hills are much worse than others). The nice thing about the LIFEPO4 cells is that even though they may sag on a steep hill, they recover. I've not triggered the CellLog alarm again when riding steep hills, but I'm lowering my gears into granny gear range, pedaling more and just gently hitting the throttle when climbing.

I bought a 3-stage, 24V smart charger that I will also use on my SLA pack periodically. The nice thing about the CellLog is that you can use their default settings for individual cells and overall pack voltage for charging and discharging or create your own custom settings. So far, my cells are staying in close alignment. Since I'm still breaking in my LIFEPO4 pack, I'm logging every ride and saving the data to compare the cells under load in different topologies (everything is hilly here, but some hills are much worse than others). The nice thing about the LIFEPO4 cells is that even though they may sag on a steep hill, they recover. I've not triggered the CellLog alarm again when riding steep hills, but I'm lowering my gears into granny gear range, pedaling more and just gently hitting the throttle when climbing.

OK, it sounds like you are doing exactly what I do except I don't have the CellLog yet. OPPs, no your not because I am still using my Currie chargers and they are single stage chargers. But I was using my 3 stage BD 12v for a while and ether way it seems to work out OK. I may buy a good 3 stage charger with higher amperage though or a whole bunch of individual cell chargers and use the CellLog plug (without the CL connected) for charging.

What charger are you using and where did you buy it? And what is the amperage?

OK, it sounds like you are doing exactly what I do except I don't have the CellLog yet. OPPs, no your not because I am still using my Currie chargers and they are single stage chargers. But I was using my 3 stage BD 12v for a while and ether way it seems to work out OK. I may buy a good 3 stage charger with higher amperage though or a whole bunch of individual cell chargers and use the CellLog plug (without the CL connected) for charging.

What charger are you using and where did you buy it? And what is the amperage?

I bought the 24V 3-stage 2A charger from All Electronics. http://www.allelectronics.com/make-a-store/item/BC-242/24VDC-2A-3-STAGE-BATTERY-CHARGER/1.html
It's not going to meet your requirement for higher amperage. However, it's such a different beast than the standard Currie charger. It's much larger and better made (higher gauge wire, etc). I'm very happy with it. It's also very affordable at $29.95. I'd also recommend the ready-wired XLR chassis plugs that All Electronics sells. They're very well made. I bought 2 and have one on hand for my second battery build. http://www.allelectronics.com/make-a-store/item/XLR-3R/CHASSIS-MOUNT-XLR-JACK-3-PIN/1.html
I do need to order a couple of single cell chargers to have on hand if I have some cells start to get out-of-range.

I''ll get two of these soon. In the meantime, I'm just going to take it easy on my batteries.

Is the alarm very loud? I'm planning on buying 2 of them and probably putting them right below my seat.


I was just playing around with mine and I don't think I could hear the alarm over the wind and road noise even if it was by my ear. I just wired the alarm output to my key circuit so it will turn off my batteries if the alarm goes. Programmed the output to nc and wired them in series.

Btw I set the low cell alarm to 2.5v. Is that a good setting?

you could probably set yours for 2.8v since you have such a flat discharge graph. Mine seem to sag to about 2.8v after 4 or 5 AH of usage. 2.5v should be fine, too, though if you want to get maximum capacity out of it. The 3000 cycles that Thundersky claims is for using 80 % of the pack or under.

Might be interesting to see how far you can get until you hit 2.8v. A guy on endless-sphere said he got about 19 AH out of his. Icecube is his username I think.

Maybe I'll go on a long ride and see how far I can get. I've been wanting to ride to the ocean13-14 miles one way.

Maybe I'll go on a long ride and see how far I can get. I've been wanting to ride to the ocean13-14 miles one way.

Be prepared to do some peddling on the way back.

I just got my celllog in the mail. Thanks for all the info.

I do have BMS on my battery pack. Does that affect the wiring on the celllog? Does the celllog balance on its own, or is it strictly a monitor?

I just got my celllog in the mail. Thanks for all the info.

I do have BMS on my battery pack. Does that affect the wiring on the celllog? Does the celllog balance on its own, or is it strictly a monitor?

It's simply a monitor unless you wire it into e-brakes, then it can cut off at low voltage, like a BMS.

Hello all,

I am contemplating ordering the Cell Log 8M. I have a few questions. First, can the unit be turned off so it doesn't consume power after one wired it.

Second, for an 8S battery system, one will need 9 wires. What connector worked the best for the people on the list? I would imagine 24 gage wire will work. Unlike BMS, there is probably no particular sequence one needs to connect the wires as the impedance is probably pretty high.

There were reworks nwmtnbkr mentioned as not to consume power from a particular cell. Is that right?? So if you have a BMS that can balance the cells, is this still an issue? I am planning to use 20AH cells.

Best regards,

Ben

Hello all,

I am contemplating ordering the Cell Log 8M. I have a few questions. First, can the unit be turned off so it doesn't consume power after one wired it.

Second, for an 8S battery system, one will need 9 wires. What connector worked the best for the people on the list? I would imagine 24 gage wire will work. Unlike BMS, there is probably no particular sequence one needs to connect the wires as the impedance is probably pretty high.

There were reworks nwmtnbkr mentioned as not to consume power from a particular cell. Is that right?? So if you have a BMS that can balance the cells, is this still an issue? I am planning to use 20AH cells.

Best regards,

Ben

Unless you're going to be making a lot of cables using JST-XH 9-pin connectors, I'd recommend that you buy a ready-made cable off e-bay, the crimper for the JST-XH connectors is expensive. http://cgi.ebay.com/Chargery-Power-DB8-8S-40cm-Balance-Charge-Leads-/270470253072?cmd=ViewItem&pt=Radio_Control_Parts_Accessories&hash=item3ef9488a10&afsrc=1 You unplug the CellLog when it's not in use--there's no power on/off button. The power drainage issue is still one you need to be aware of--as it ships from the factory, the unit will only draw power from cells 7 and 8 in an 8-cell configuration. In theory, your BMS should make sure that the cells are charged properly to stay in balance, but you may need to keep track of how well it's doing if you're not using a charger like the iCharger line that balances as well. Good luck. I think the CellLog 8 is a wonderful tool.

Thank you nwmtnbkr for the advise and notes.

So let me clarify that if I jump per green circle, the unit will take power from all cells.

Really appreciate the note one must unplug the unit, and that there is no on/off button, though there are three buttons on the product. Chatting with Hobby King people, they didn't know either.

BTW, it appears you have the 20AH Thundersky cells. Where did you buy them?

Best regards,

Thank you nwmtnbkr for the advise and notes.

So let me clarify that if I jump per green circle, the unit will take power from all cells.

Really appreciate the note one must unplug the unit, and that there is no on/off button, though there are three buttons on the product. Chatting with Hobby King people, they didn't know either.

BTW, it appears you have the 20AH Thundersky cells. Where did you buy them?

Best regards,

bhuan1103, you're right; to get the CellLog to draw power from all cells you need to solder a small copper wire in the area circled in green. (FYI, this fix will also prevent the CellLog from working with a 2-cell battery pack; that seems to be the reason that the manufacturer isn't instituting the 8-cell fix.) I got my Thunder Sky cells from Elite Power Solutions, which is based in Arizona. They got them to me quickly and shipping to me was a reasonable $15 (I'm in Montana, those living farther east may have a slightly higher shipping fee). I bought 2 12V 20AH batteries (4 cells each) while they were on sale for $104 a piece. Their regular price is reasonable--$120. I'm very happy with the Thunder Sky cells. They certainly pack a lot more power than my OEM SLA pack did new. I still use the OEM SLA but it is beginning to loose capacity and I'll build a second Thunder Sky pack this summer. I'll be buying a second CellLog 8 for the new battery build. I'll order the second CellLog from epbuddy.com (in Ohio) since they got my first unit to me very quickly and for around the same price as Hobby King, once you add international shipping to the Hobby King price. Good luck.

I ordered one of those ebay harnesses for my 8s1p headway pack and it installed pretty easy. Its great to finally seen all the pack voltages at a glance. The only complaint I have is that the ring terminals are a little on the small side for ebike use. They're more a size you'd expect on a RC vehicle.

Sorry to be responding so long after you posted the question, morph. I didn't see it until CowTowPeddler bumped the thread with his post. I bought my CellLog 8 from EPBuddy in the US. It was actually cheaper than ordering from Hobby King, once I added the postage charge from Hong Kong. Plus, I got my unit from EP Buddy in about 4 days. The original CellLog 8 that is capable of logging comes with a mini-USB cable so you can hook the CellLog 8 to your computer to download data about the cells of your battery under load, a pair of mini-alligator clips so you can measure the voltage of individual cells and a CD with LogView software and the CellLog manual. You have to buy the cable to connect the 8 cells. I ended up ordering a cable harness off e-bay for $13, with free shipping. It's gone up by a $1.50 and is now $14.50, but shipping is still free. http://cgi.ebay.com/Chargery-Power-DB8-8S-40cm-Balance-Charge-Leads-/270470253072?cmd=ViewItem&pt=Radio_Control_Parts_Accessories&hash=item3ef9488a10 It is very well made and if you have an iCharger 208 or 110, you can use the banana plugs to connect to the charger. I cut off the banana plugs and wired an XLR chasis connector to be able to use my 3-stage, 24V smart charger.

I'm extremely happy with my CellLog. Not only does provide the functionality of a BMS, I can look at data of the cells under load in a variety of formats to determine the health of my battery pack. It's worth every penny.i

Can you tell me how quickly you received your cable connectors after you ordered them? As always I waited till the last minute and just noticed they maybe shipped from China and I don't have time for that. Also I am wondering if you have found a male matting connector. I would like to use your cable for the CEllLog 8 while riding and then use this same connector for my individual cell chargers. therefore, I need a matching male connector to connect from the other connector set to the individual cell chargers. Even if the connector comes with short or no wires I can still splice things together. Do you know what this connector size is called so I might find the online somewhere? thanks, Bob

i

Can you tell me how quickly you received your cable connectors after you ordered them? As always I waited till the last minute and just noticed they maybe shipped from China and I don't have time for that. Also I am wondering if you have found a male matting connector. I would like to use your cable for the CEllLog 8 while riding and then use this same connector for my individual cell chargers. therefore, I need a matching male connector to connect from the other connector set to the individual cell chargers. Even if the connector comes with short or no wires I can still splice things together. Do you know what this connector size is called so I might find the online somewhere? thanks, Bob

I ordered mine in late February, wrong time to order anything from China due to the national holiday (everything shuts down or slows down). The seller got the package to the Hong Kong Post immediately. However, it sat for several days in the Hong Kong Post before they finally processed it. Once the Hong Kong Post processed the package, I got it in about a week. It might take slightly longer for you since I'm farther west than you are. I don't think you'll experience delays.

I ordered mine in late February, wrong time to order anything from China due to the national holiday (everything shuts down or slows down). The seller got the package to the Hong Kong Post immediately. However, it sat for several days in the Hong Kong Post before they finally processed it. Once the Hong Kong Post processed the package, I got it in about a week. It might take slightly longer for you since I'm farther west than you are. I don't think you'll experience delays.

Hmm, this maybe a bummer though. I was planning on taking 2 bikes with me on vacation and wanted to have these installed. The CellLog 8s shipped today USPO so I should have them by Tuesday next week. But they are useless without the cables. I was hoping this vendor was state side. I need to have everything finised by the 22nd because I am leaving on the 23rd. I still need to throw together a second box for my 2nd TS pack too. I guess I'll have to put the milling machine in high gear..lol.

Hmm, this maybe a bummer though. I was planning on taking 2 bikes with me on vacation and wanted to have these installed. The CellLog 8s shipped today USPO so I should have them by Tuesday next week. But they are useless without the cables. I was hoping this vendor was state side. I need to have everything finised by the 22nd because I am leaving on the 23rd. I still need to throw together a second box for my 2nd TS pack too. I guess I'll have to put the milling machine in high gear..lol.

If you've placed the order, you may be fine. It only took the Hong Kong Post a week to get the package to me. I'm west of you, but the USPS may get the package to you fairly quickly once it clears Customs.

If you've placed the order, you may be fine. It only took the Hong Kong Post a week to get the package to me. I'm west of you, but the USPS may get the package to you fairly quickly once it clears Customs.

I have 2 CellLog 8 and cables on order so with luck they will arrive in time for me to mount on the packs before I leave. Tomorrow I will try to find time to build my second pack box. I look at the single cell chargers and found they are on sale right now for only $8.76 each at voltphreaks https://p10.secure.hostingprod.com/@www.voltphreaks.com/ssl/catalog/product_info.php?cPath=3&products_id=60&osCsid=b548f3f2edb6910f41cdb0cff62a9ebe I think it's only because they are out of stock again and trying to get some predelivery orders. they are scheduled in the end on June. It will be to late for my trip but I decided to order them anyway. I ordered 18 of them. I am hoping that I can strip them down and reassemble 8 of them in a small box with a cooling fan and maybe some power lights and an on/off switch. With 18 of them I can build 2 complete chargers and have 2 spares. A little crazy but I trust these individual charges a lot more then I do a BMS and charge combo. I want to be able to maximize my charge and see if it futher improves my mileage per charge.

I need to find the same plug that is on the CellLog 8 so I can use it to charge the packs through the plug I am going to install for the Celllog 8s. I am assuming the CellLog 8 has a female plug and the ones I ordered on EBay is a matching male plug. So I need to find a set of the female plugs......Any ideas where to find them......or what this plug style is called?

I have 2 CellLog 8 and cables on order so with luck they will arrive in time for me to mount on the packs before I leave. Tomorrow I will try to find time to build my second pack box. I look at the single cell chargers and found they are on sale right now for only $8.76 each at voltphreaks https://p10.secure.hostingprod.com/@www.voltphreaks.com/ssl/catalog/product_info.php?cPath=3&products_id=60&osCsid=b548f3f2edb6910f41cdb0cff62a9ebe I think it's only because they are out of stock again and trying to get some predelivery orders. they are scheduled in the end on June. It will be to late for my trip but I decided to order them anyway. I ordered 18 of them. I am hoping that I can strip them down and reassemble 8 of them in a small box with a cooling fan and maybe some power lights and an on/off switch. With 18 of them I can build 2 complete chargers and have 2 spares. A little crazy but I trust these individual charges a lot more then I do a BMS and charge combo. I want to be able to maximize my charge and see if it futher improves my mileage per charge.

I need to find the same plug that is on the CellLog 8 so I can use it to charge the packs through the plug I am going to install for the Celllog 8s. I am assuming the CellLog 8 has a female plug and the ones I ordered on EBay is a matching male plug. So I need to find a set of the female plugs......Any ideas where to find them......or what this plug style is called?

The CellLog 8 has a male connector. It plugs into a female connector, if you ordered the wiring harness off Ebay, it will be the correct connector. For your charger build, you need to buy JST-XH 9-pin connectors (be careful not to buy those used by toy train hobbyists--they're too small). You'll also need a special crimping tool for this connector. You can buy the JST 9-pin connectors from digi-key.com. Here's a link for the specific connector you'll want to get. http://search.digikey.com/scripts/DkSearch/dksus.dll?WT.z_header=search_go〈=en&site=us&keywords=455-2217-ND&x=12&y=26 (http://search.digikey.com/scripts/DkSearch/dksus.dll?WT.z_header=search_go%E2%8C%A9=en&site=us&keywords=455-2217-ND&x=12&y=26)

If you ordered the ready-made wiring harness off Ebay, you have another option for the chargers you're wanting to build. Consider using banana connectors since that's whats on the built-in charging connectors on the Ebay harness. The wiring harness is built for use with the iCharger series of chargers, which are made by the same company that builds the CellLog 8--Junsi.

The CellLog 8 has a male connector. It plugs into a female connector, if you ordered the wiring harness off Ebay, it will be the correct connector. For your charger build, you need to buy JST-XH 9-pin connectors (be careful not to buy those used by toy train hobbyists--they're too small). You'll also need a special crimping tool for this connector. You can buy the JST 9-pin connectors from digi-key.com. Here's a link for the specific connector you'll want to get. http://search.digikey.com/scripts/DkSearch/dksus.dll?WT.z_header=search_go〈=en&site=us&keywords=455-2217-ND&x=12&y=26 (http://search.digikey.com/scripts/DkSearch/dksus.dll?WT.z_header=search_go%E2%8C%A9=en&site=us&keywords=455-2217-ND&x=12&y=26)

If you ordered the ready-made wiring harness off Ebay, you have another option for the chargers you're wanting to build. Consider using banana connectors since that's whats on the built-in charging connectors on the Ebay harness. The wiring harness is built for use with the iCharger series of chargers, which are made by the same company that builds the CellLog 8--Junsi.

Great and thanks. I will wait until the CellLogs arive then look into the charger plugs. Yes I did buy the harness from Ebay. It's the one you recommended. I emailed them and they told me they would also build me a male harness for the chargers but they didn't give me a cost. they want a drawing of exactly what I want though. not sure why they need a drawing of a harness.