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Old 03-03-09, 09:57 PM   #1
Allan
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DIY Battery Pack for MiNewt X2

Hello all,

I just bought a MiNewt X2 light that didn't include a battery pack. I'm in the process of tracking down a battery pack and charger combo, and could use some help. I'm trying to find out the specs on the orginal battery pack for this setup. Some of the things I need to know is what is the voltage of the pack, the peak, working and cutoff. The capacity, and the maximum discharging rate of the pack.

If you have just some of the info, that's cool. Also if you have any links to more info, such as someone else doing this, or what have you, I would be interested in seeing that too.

Thanks alot for reading this and any help is greatly appreciated.
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Old 03-03-09, 10:05 PM   #2
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The battery pack is actually the battery/switch/and driver.
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Old 03-03-09, 10:51 PM   #3
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The packs I'm looking at have the Protection Circuit Module with the pack. It's for controlling the voltage. That's the driver I believe. The switch is no big deal. The problem is I don't know the specs.

Also if anyone has any references to battery supply stores they would recommend, that would be great. I found these guys that look good and recommended, www.batteryspace.com
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Old 03-04-09, 02:35 AM   #4
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The packs I'm looking at have the Protection Circuit Module with the pack. It's for controlling the voltage. That's the driver I believe.
I think you may be confusing two different things.

The Protection Circuit Module limits the minimum and maximum voltage of the battery and possibly the charge rate, most of the time it does nothing and it is there to protect the battery.

A driver only functions when the light is on - when it's driving the LED - and as such it is a regulator supplying a fixed current to the LED. Subsequently the LED is run at a safe (and usually lower) voltage, this has two benefits - consistent brightness and if the current is low enough, longer runtimes.

Having said that I'd be very surprised if any headlight on the market had the driver in the battery pack and not built into the unit.

Hope this helps.
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Old 03-04-09, 02:48 AM   #5
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Having said that I'd be very surprised if any headlight on the market had the driver in the battery pack and not built into the unit.
The minewt has the battery/driver/switch all built into the remote pack.

The light head is just the main led and a red/blue indicator led.
You can get them for 50$ from nightrider. Allan is this what you have?
http://www.niterider.com/store_headlamps.shtml

The "battery" is $140
http://www.niterider.com/store_batteries.shtml
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Old 03-04-09, 04:06 AM   #6
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The minewt has the battery/driver/switch all built into the remote pack.
Cheers

I stand corrected.



nb. that means it has to have the OE battery ?
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Old 03-04-09, 04:33 AM   #7
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nb. that means it has to have the OE battery ?
Well you can probably substitute your own battery/driver.

I guess once your battery dies nightrider will do a swap/refurb and you shouldn't need to pay the full $140 (thats about what I paid for my whole light).
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Old 03-04-09, 11:37 AM   #8
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Yes znomit, I got the MiNewt.X2 Headlamp. I got it on Amazon with shipping for $30. I figured I could get a batterypack/charger for alot cheaper than what it is retailed for. I haven't given up yet, but this is a set back.

So there needs to be a controller for the voltage and amperage coming from the battery to the light. I need to find out what the specs are to that.

I found about three suppliers that look promising. I haven't checked my email yet today, so I'll have to see what today entails.
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Old 03-04-09, 12:16 PM   #9
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So there needs to be a controller for the voltage and amperage coming from the battery to the light. I need to find out what the specs are to that.
That depends on what the original light did (number of modes) and what you want it to do now.

Also the type of connector it has could come into the equation.

There's nothing to stop you direct driving the headlight if the connector will allow it or removing the connector if necessary.

Alternatively (to direct drive) you could make a battery pack up and use one of the drivers that are used in torches, again depending on how the headlight is wired internally.
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Old 03-04-09, 12:51 PM   #10
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Anyone know what the voltage is coming off the fully charged battery pack on this setup? That's the forth battery pack down on this page, http://niterider.com/store_batteries.shtml Sku# 6488
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Old 03-04-09, 01:00 PM   #11
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Anyone know what the voltage is coming off the fully charged battery pack on this setup? That's the forth battery pack down on this page, http://niterider.com/store_batteries.shtml Sku# 6488
How many pins does the connector have ?

If the light has several modes the pack may have several levels of regulated output.
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Old 03-04-09, 01:47 PM   #12
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From what I've seen when I was researching the x.2 (I bought a new one), no one admitted to having success in figuring a diy solution out. You might also check the lighting forum on mtbr.com and the bike light forum on candlepowerforums.com. Good luck on your quest and be sure to report back if you figure it out...
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Old 03-16-09, 12:20 AM   #13
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Hey guys,

Would we be able to figure alot of this out if we had some figures on the battery pack? I could ask someone that has one and see if I could get some measurements off the battery pack with the voltmeter. I guess this is assuming no one has done this yet.
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Old 03-16-09, 05:24 AM   #14
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Best case:
You need to open up the light head, use a multimeter to check the connections from the LED to the end of the cable (assuming its a direct connection). Then you need to buy an appropriate driver, battery, switch, something to house them in and some way to mount it to the bike, and figure out how you're going to connect it all to the led. You'll need a charger too.
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Old 03-16-09, 06:05 AM   #15
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Or if you don't fancy doing that, you can sell it to me
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Old 05-01-09, 10:42 PM   #16
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Any updates on the DIY battery pack?
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Old 05-02-09, 11:01 AM   #17
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A friend of mine has this light and tried to get some reading off the charged battery pack. He said there's some protective circuit that shuts down when it's disconnected from the light. I've posted on other forums online and have gotten no where too. The supply companies needed the specs. Without that, they couldn't supply a pack. I've pretty much given up on making a battery pack for this light.

So instead of risking screwing this light up, I'm going to go ahead and ebay it. I'll use the money to build one of you guys diy lights! Not sure what the procedure is around here, so if anyone wanted notice when I put up the light on ebay, just message me.

Unless anyone has any ideas, I'm pretty much over with this little part of my adventure.
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Old 05-02-09, 12:59 PM   #18
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Someone over at Candlepower updated his battery pack to use larger capacity cells. I’ll post a link to it when I find it, it may help.
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