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Old 02-25-12, 02:23 PM   #1
Star Dogg
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Hi! New here, and trying to make a battery decision for my trike :)

Hello,

This is my first post here, but I'm glad there's a forum for these bikes! I love my trike, and had two e-bikes before it (a lemon of a Giant and a charger). This is a newer model torker (smaller back wheels) that I had modified. I have a progressive disability that no longer lets me lift the weight of a bike and battery, plus I was able to add a crutch holder to this. I'm not sure what kind of hub/motor is on this one, but it allows me to either pedal assist, add throttle, or just cruise on the throttle on my bad days.

Now I'm running into a battery issue and would love some input on what to do from here. Right now I have 3 12v (lead acid?) batteries on the trike and a blown charger for them. I had someone look at it and it's definitely the charger, not the batteries. Before it blew I was already thinking about upgrading my system to expand my range. I was planning on a 8 to 10 mile rt when it was built, but where I'm living now I'd like to double it if possible.

The shop who built the bike had told me that I could just piggyback an extra 3 pack of the same batteries in the future if I wanted to do that, and from my research that and a new charger should cost me about $200. My local e-bike guy said switching up to a lithium battery would be more expensive, but give me a better range, better power, and faster charging time. That would be about a $600 estimated upgrade through him.

I'm a little clueless past that on battery technology. I'm on a fixed income, so obviously $200 sounds better, but this trike is essentially my car and if $600 is a better investment in terms of range/weight/length of battery life over the long run, it makes sense to pay now instead of later.

I also may want to tow a small trailer for groceries in the future. Suggestions, advice? Thanks!
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Old 02-25-12, 05:53 PM   #2
Sangesf
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36v 15Ah lithium battery with BMS and charger can be had on eBay for $300 shipped...
Look it up and look for seller DAOJI888..
I've bought three from them and they rock...
That battery should get you 16-20 miles easily...
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Old 02-26-12, 06:19 AM   #3
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That seller has poor feedback and is in China.

Why are we so quick to hire people in China with poor feed back to build our battery packs when we have cells a plenty, in Florida anyway ?

PM me Sangesf and lets start keeping some of that money in Florida ?
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Old 02-27-12, 05:06 PM   #4
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Well, I've had nothing but good luck with the 20ah packs I've bought from them...
They've even exceeded their specs..
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Old 02-28-12, 05:12 PM   #5
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Quote:
Originally Posted by Sangesf View Post
Well, I've had nothing but good luck with the 20ah packs I've bought from them...
They've even exceeded their specs..
I tried to leave you a pm but I don't have enough posts. It says I need over 50.

I am not that chatty so here is the pm.

Hey, There is someone your way selling what may be some of the best cells on the planet for cheap.

http://www.ebay.com/itm/180830931599...84.m1423.l2661

I would not offer him more than $6.50 per cell.

I am in Tampa. This is one of the few places I post.

I have been building custom packs for friends for awhile now.

Li ion was invented for Florida kids to play with (NASA).

http://ntrs.nasa.gov/archive/nasa/ca...2007033092.pdf

Last edited by biker; 02-28-12 at 05:28 PM.
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Old 02-29-12, 08:53 PM   #6
Sangesf
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I'm getting th prismatic 20Ah cells
For 1/2 that price
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Old 02-29-12, 09:31 PM   #7
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There you go !

Stick with real A123 !

They last a long time and have safety features that a lot of others lack.
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