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Battery charging Question

Old 04-17-2022, 06:18 PM
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Default Battery charging Question

How to charge?

Got no idea what settings to charge this on. Please help. TIA.
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Old 04-17-2022, 06:28 PM
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It says on the battery, lithium specific charger (CC/CV) at no more than 3A. If using an RC charger, the voltage is 4S.
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Old 04-17-2022, 07:19 PM
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Originally Posted by rearviewmirror View Post
It says on the battery, lithium specific charger (CC/CV) at no more than 3A. If using an RC charger, the voltage is 4S.
Specifically LiFe mode 4S. LiPo mode will kill it.
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Old 04-17-2022, 09:55 PM
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So life mode at what voltage and amps? I don't really understand all this 4C stuff.
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Old 04-17-2022, 10:19 PM
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Originally Posted by willsy8.2 View Post
So life mode at what voltage and amps? I don't really understand all this 4C stuff.
3.2 x 4 = 12.8V = 4S
3 Amps maximum

As gigaplex mentioned, LIFE mode on an RC charger or a lithium specific car/motorcycle charger.

An RC charger will ask you to specify the number of cells, in this case itís 4. You can choose any amount of amps up to 3.
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Old 04-20-2022, 07:57 PM
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what are you going to do with it? allot of those are for motorcycles and lawnmowers. the cheaper ones done have electronics in them and it looks like your doesnt. search for BMS or battery management system on ebay. get 1 that does the amperage at 4s. it should be super cheap. then you can use any charger you want including an alternator on a motorcycle or car or Ö

the better/newer ones have an integral BMS. but china has taken the tech and sells it as a standalone green board.
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Old 04-21-2022, 07:41 PM
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This one has an internal BMS.
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Old 04-21-2022, 09:40 PM
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Originally Posted by GerryH View Post
This one has an internal BMS.
Are you sure? If it did, it likely wouldn't specify the requirements to use a CC/CV charge mode at specific voltages/currents on the label.
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Old 04-25-2022, 04:21 PM
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2 different website have specifications for this specific battery:
An internal battery management system (BMS) ensures all cells are uniformly charged and discharged, as well as providing short circuit, over current, and reverse polarity protection. This provides you with a higher degree of protection than a traditional lead acid battery which is unprotected, and can discharge rapidly under short circuit conditions, causing fire and damage. The internal BMS will also limit discharge and manage cut-off voltage, to further protect the internal cells.

Can still have a BMS and use CC-CV charging.
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Old 04-25-2022, 09:40 PM
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Originally Posted by GerryH View Post
2 different website have specifications for this specific battery:
An internal battery management system (BMS) ensures all cells are uniformly charged and discharged, as well as providing short circuit, over current, and reverse polarity protection. This provides you with a higher degree of protection than a traditional lead acid battery which is unprotected, and can discharge rapidly under short circuit conditions, causing fire and damage. The internal BMS will also limit discharge and manage cut-off voltage, to further protect the internal cells.

Can still have a BMS and use CC-CV charging.
If the BMS requires CC-CV charging, it's not safe to connect to an alternator.
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Old 04-26-2022, 12:58 AM
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this battery is bot intended for a motorcycle it is a powerwheels battery. it gives all details on side label 4 cells at 3.7 volts max at 3 amps do some online checking on life or A123 cells
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Old 04-26-2022, 08:07 PM
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if it requires external cc/cv it doesnt have the type of BMS that it should have. A bms on an automotive lithium based battery is designed to take alternator/generator power and condition it for the battery to not need another charger.

for example. most people will not use a lithium based battery on a motorcycle. they are half the weight, retain voltage much longer than lead acid, dont need to be topped off….there is a huge list of advantages and 1 main disadvantage. Originally none had a BMS and had to be charged by a cc/cv charger. you can still get them without the BMS. Motorcycle guys still read all the posts out there of horror stories posted on the internet and are waiting for a new technology that manages the cc/cv charging. what they dont realize is the BMS is designed to do that. I run a lithium battery on my motorcycle. it has a BMS and is charged from the alternator. Ive been running it this way for years. something weird here.

If it says cc/cv then thats what I would use. But you could get a BMS that can handle the cc/cv externally to charge it properly or just get a cc/cv charger like we use in rc.
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Old 04-27-2022, 12:00 PM
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Originally Posted by rearviewmirror View Post
3.2 x 4 = 12.8V = 4S.
That is nominal voltage. Charge voltage of an LiFe battery is 14.2
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Old 04-27-2022, 12:11 PM
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isnt life cell full charge 3.7 so 4 x 3,7 is 14.8
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Old 04-27-2022, 02:00 PM
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Originally Posted by the rc guy View Post
isnt life cell full charge 3.7 so 4 x 3,7 is 14.8
Not sure what your source is, but 3.6 is what I'm seeing.
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