Li-ion Battery Charger Using Old Laptop Battery Circuit

Thread Starter

yousefzidan

Joined Mar 3, 2017
8
Hi everybody

Is there any way to use laptop battery circuit to charge 18650 li-ion cell standalone .
Because i have a lot of old battery and i need to build about 20 charger and i need to save some money.411595641_729.JPG

Thanks in advance.
 

ian field

Joined Oct 27, 2012
6,539
Hi everybody

Is there any way to use laptop battery circuit to charge 18650 li-ion cell standalone .
Because i have a lot of old battery and i need to build about 20 charger and i need to save some money.View attachment 140071

Thanks in advance.
They tend to have "firmware" that can complicate things.

Some battery pcbs will refuse to co operate if they don't detect the expected hardware.

There are cell balancer boards on eBay that take a lot less figuring out.

A couple of blogs go into firmware hacking, but most I've seen are for Apple stuff.
 
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