Durable Laptop Batteries
LiFePo4 A123 Systems, best rechargeable Battery 18650 for EV, Solar, Wind and more.
LiFePo4 A123 Systems. This is today the best rechargeable Battery for EV, Solar, Wind and more. I have purchased this 18650 3.3V or(3.2V) 1100mA battery on eBay for about 0.6$ /Wh including shipping. In large quantities probably over 1KWh you can get this at even lower price/Wh For now this are probably the best battery for almost any application if compared price vs performance. They are much safer than other Lithium batteries and will not explode or burn.
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I will upload a video? now about 20Ah A123 cells you can see that one.
That wouldn’t be any good for a moped either, would? it?
i have manage to find the 20Ah one can you tell me if its the right model and how munch volts it is i will send you the link in PM ??
The 20Ah I got them from China alibabadotcom and the 100Ah GBS from Canada I was not able to get better price for them in China.?
from where i can find? the 20Ah cells or 100Ah ones ?
is it only eBay or i can buy them from another country lets say China ?
part2 … for 144V you will need 40cells of this type of batteries they charge at max 3.6V/cell so 3.6Vx40 = 144V but with this small 18650 will get only 144V at 1Ah that is 144Wh so you will need many strings in parallel to get to whatever capacity you need.
You will probably need minimum 5kWh up to 10kWh depending on the quality of your build total weight and range.
For 5kWh you need 1400 of? this small cells or 80 of the 20Ah one or get 14kWh with 40 of the 100Ah cells.
I got this from eBay but I will not recommend them for an EV since they are small and you will need a lot of them.
Watch the last few minutes from my last video you can see there 20Ah prismatic cells from the same manufacturer A123 they are equivalent with 20 of this cells so you will be needing much less cells and even so there will be a lot to connect.
I will? soon get 100Ah cells wit a bit different chemistry from another company I will use them for solar off grid application.
from where i can buy this batteries ?
and how munch? i’m gonna need for 144v EV (electric car) VW ?
NiMH are normally charged to 1.45V / cell not sure exactly what battery you have if is a AA then is probably 2000 to 2500mA in capacity and you will probably want to charge that at 0.1C so about 200mA for about 10 to 12 hours.
They usualy do not last that long and have quite a bad self discharge compared to others chemistry. ?
I forgot about the lab and thought it was a charger. I sold those power supplies and many electronic equipment long time ago to take care of my mother.
Do you know how to? charge a dead or weak NiMH battery? Or try to bring it back to some useful life?
Is not? a charger is a lab power supply but it can be used to charge any type of battery and it was close to 200$.
Very nicely done.
How much? is that charger?
Thank you for sharing it to us all.
I probably still did not understood but I will try to answer.
You can have each two battery in parallel and then 3 of this groups in series they will work from fully charged 4.2Vx3 = 12.6V down to discharged 3Vx3=9V you can? have two wires at the ends positive and negative and another two wires at the connexions between batteries and you can charge each 2 parallel cells with 4.2V you will need to do this 3 times for each 2 cell group there is no other simple way.
No you miss understand me, sorry, i wanna make a 11.1v battery (fully charged 12.6) , but to charge it nice i need to? build a balance cable that chargers each cell to 4.2V not the full pack… using all six cell to have 11.1V 4.4A, using series and parallel but the problem is the balance cable that charger each cell alone.
So you want to make a charge for a notebook laptop. Usually the notebook battery has? the monitoring electronics inside and you need to communicate with that using a sort of I2C bus so not easy to do.
You can find on ebay search for “external laptop battery charger”.
If you only have the cells no electronic then you can manually charge each cell at 4.15V you will need a lab power supply or some sort of CC CV power supply and limit the current to 1A
Hi, i bought a notebook battery that doesn’t match with my notebook so i opem and take 6 cells, it has 2.2a and 3.7v~4.2 so the question how can i balance the cells i use two 18650 holder that use 3 cell series and put it in parallel now i need to balance the cells, how i make this? cable to charge and balance?
Good? info-
THANK YOU SIR. GIANFRANCO FRONZI.? JAN.21/12
I paid 0.6$/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.
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.
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.
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.
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
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.
Yes is the only one on eBay with this? batteries.