Comments on: LiFePo4 A123 Systems, best rechargeable Battery 18650 for EV, Solar, Wind and more.

By: electrodacus

electrodacus — Fri, 27 Jul 2012 21:31:25 +0000

Yes is the only one on eBay with this? batteries.

By: ShadowwwLFS

ShadowwwLFS — Fri, 27 Jul 2012 21:22:32 +0000

Hehe, good to know. I have 8 batteries from him (18650, going to use in 4s2p config for bike light with a 8W LED), and I? still wasn’t sure if they are genuine. Now I do, thanks.

By: electrodacus

electrodacus — Fri, 27 Jul 2012 20:25:34 +0000

I do not know? for sure that they are genuine but they work great.
I will also probably by more but I will need 1kWh battery and this are a bit small for this next application. I will still get LiFePO4 since this is a great technology for what I need but probably go with Headway 16Ah parts less soldering

By: ShadowwwLFS

ShadowwwLFS — Fri, 27 Jul 2012 19:36:19 +0000

A123 Systems also has 20 Ah pouch cells -? they’re hard to find, but if you’re lucky you can find them for $40/cell or so.
For 1 kWh you’d need just 15 of them, which’d cost you $600. Pretty expensive, but depending on what you need them for they may be worth the investment.

By: electrodacus

electrodacus — Fri, 27 Jul 2012 19:21:57 +0000

Thanks I need to search and see how they are.
Most LiFePo4 are about 0.6$/W including shipping and that is fine? for me.

By: thegreatnoleander

thegreatnoleander — Fri, 27 Jul 2012 18:29:31 +0000

According to user responses on EV forums, A1234 is the worst for the money. It’s an awesome battery buy it’s? way too expensive. Thunsder-Sky and CALB took the lead, with Headway not too far behind. A123 cells are only good where you can’t fit anything else in the given area and you absolutely need that high discharge rate or you can afford to buy the most expensive thing around.

By: electrodacus

electrodacus — Fri, 27 Jul 2012 17:59:46 +0000

I paid 0.6$/Wh on this battery. How much cheaper are the others? and do they offer the same reliability and cycle life?
The cost of battery for comparison is usually done as $/kWh during the life of the battery.
This A123 have at least 2000cycles to 80% discharge? and cost 2$ 3.3V 1000mA = 3.3Wh x 2000cycle = 6.6kWh for the lifetime so about 30cent /kWh stored.
Now the prismatic A123 20A may be better for large system but I do not think is under 20cent /kWh.

By: 9493760

9493760 — Fri, 27 Jul 2012 17:38:57 +0000

THANK YOU SIR. GIANFRANCO FRONZI.? JAN.21/12

By: PERIZ99

PERIZ99 — Fri, 27 Jul 2012 17:34:39 +0000

Good? info-

By: malicious1111

malicious1111 — Fri, 27 Jul 2012 17:32:25 +0000

Hi, i bought a notebook battery that doesn’t match with my notebook so i opem and take 6 cells, it has 2.2a and 3.7v~4.2 so the question how can i balance the cells i use two 18650 holder that use 3 cell series and put it in parallel now i need to balance the cells, how i make this? cable to charge and balance?