18650 battery charger for two batteries
thingiverse
A 18650 battery charger that I designed is able to charge two batteries at the same time with a total current of up to 2 amps. Each TP4056 chip in this design can deliver a maximum current of 1 amp. By bridging the positive and negative pins between each chip, we can increase the total current output to 2 amps. If you want to charge two batteries at the same time, you will need a phone charger with a capacity of 2Amps or more. A lower amperage charger will charge each battery slower. You can see the schematic for this design in the pictures above. If you have any questions or concerns about how it works, please leave a comment below and I'll be happy to help!
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