greg555

Is it me or do these packs look really swollen?????

I was excited about possibility of using cells from Fiat 500 electric car battery but they are way too big PS. Anyone wanna make Home Powerwall?

Why is this all so difficult???

these are called 18650 and are found in laptop batteries and TESLA cars These cells are great but also there are not so great Chinese versions that advertise as 9000 mah but have like 500mah

Quick search points out to $4.25 So that's $170 in batteries alone. £142 is 170 USD so there is no room for profit unless they get it are way better prices.

10S4P means 32-42V correct? And 11600mah so these cells are 2900mah each. If they are in fact these cells then it should be good Wondering of what the range would be with 11600??? Also could you charge these with OEM Oset charger. They dont mention anything about balance leads

https://www.google.com/search?q=9+Ah+this+is+LiFePO4&rlz=1C1ASUC_enUS663US663&oq=9+Ah+this+is+LiFePO4&aqs=chrome..69i57&sourceid=chrome&ie=UTF-8

how does this compare to OEM batteries? What kind of range improvement?

Missed that one So? Whos gonna be a test mule? Its a expensive proposition for me since I have 2 boys (almost $800). Plus I just got a battery pack from Fiat 500e that I will be taking apart and maybe I can use these cells on the kids bikes. Like this one http://www.fiatpartswebstore.com/products/gb/FIAT/500E/BATTERY-KIT-Hybrid/11241489/68225701AD.html?partner=googlebase_adwords&kwd=&origin=pla

I don't see any 10s Chargers on hk

Bosch

Can u post a picture? So funny, today I thought about this thread because im in the process of taking apart a Fiat 500e battery and was thinking if these cells would fit my boys Oset 16's

I am not a stranger to soldering so lets say I want to make some LIFEPO battery packs for my boys. They are both on 36V osets. Whats the max V you would recommend and what BMS do I get and how do I wire it. Also am I assuming correctly that OEM Oset chargers can be used? Thanks. Greg

How hard is it makr a battery pack with BMS?

Question still remains - Lipo or Life? Greg

per channel luckily

I've read the whole thread last night, even your drunk replies and have a good idea on how this all work and think 2 batteries per bike would be simpler than what some folks have done in the past. I have 2 boys on 2x 16.5Rs and need to upgrade to something better but question still remains if I should do 6S and 4S or 6S+6S per bike. I like the idea of having 4 batteries because I could charge them all at once. I have a decent charger and PSU for my multi-rotor but most I can charge at is 5A and wondering what sort of time will it take to charge 20Ah battery (4 of them). I've been pretty decent about my Lipo batteries except maybe for storing them charged for too long. I was planning on making 4 super long balance charge extensions and balance charging every time. And of course now there's a question of lipo vs lifepo Thanks Greg

What do you guys think about these. Multistar High Capacity 20000mAh Multi-Rotor Lipo Pack They have them in 6S (22.2V) and 4S (14.8V) http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=80908 $138.60 http://www.hobbyking.com/hobbyking/store/__80900__Multistar_High_Capacity_4S_20000mAh_Multi_Rotor_Lipo_Pack.html $98.08 Looks like they would fit flat inside battery tray on 16 bike. Also 20000mAh sounds like a lot Anyone tried 44.4V 2x (6S) on the 36V model controller? (2015 bike)???? Or one 6S and one 4S @37V would be ideal? Also am I correctly thinking that 20Ah would be heavenly??? I think 2 of these in either 2x6S (2 of them would be 200 x 90 x 120mm) or 6S and 4S (2 of them would be 200 x 90 x 100mm) would be super clean with minimal wiring and plenty Ah. (maybe too much) Thanks Greg

Let me know. Thats my theory. Would like to know if I was correct or need new bearings

Mine does it but I think what you're feeling is a resistance of the electric motor try without chain Greg

post updates Greg