Wii portable BMS board

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Oct 13, 2025
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hello.
I am building a wii portable and I bought this BMS board off of AliExpress and quickly realized that I screwed up. I am using a 3S battery and want to charge it with a barrel jack or some sort of USB. I want to know if there are any boards that you recommend or if there is a way to use this one that I bought.

AliExpress:
the problem with this board is that you first of all need consent current and voltage and I cant find anything that is high enough voltage with enough amps to charge well. and I have started hearing right after I bought it that these types of bms boards only stop the flow of current when there is a fault on all 3 cells so only when all 3 are too high.

thank you for your help!
 
hello.
I am building a wii portable and I bought this BMS board off of AliExpress and quickly realized that I screwed up. I am using a 3S battery and want to charge it with a barrel jack or some sort of USB. I want to know if there are any boards that you recommend or if there is a way to use this one that I bought.

AliExpress: gd

the problem with this board is that you first of all need consent current and voltage and I cant find anything that is high enough voltage with enough amps to charge well. and I have started hearing right after I bought it that these types of bms boards only stop the flow of current when there is a fault on all 3 cells so only when all 3 are too high.

thank you for your help!
Yeah, those cheap BMS boards from AliExpress usually just provide overcharge/overdischarge protection, not actual charging regulation. You still need a proper CC/CV charger for a 3S pack (12.6V).
If you want USB charging, you’ll need something like a step-up (boost) converter that can take 5V and output 12.6V reliably.
How much current do you expect your Wii portable to draw during use?
 
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