18650 Battery Charger

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You will need the following components:

- 3.5 Inches by 4.5 Inches Piece of Wood
- (4) 18650 Batteries
- (4) TP4056 Charging Modules
- 18650 Battery Holder
- Double Sided Tape

Add the tape on the backs of the TP4056 boards.

Also add tape on the back of the battery holder.

Now place the battery holder onto the piece of wood.

Now add the TP4056 boards above the battery holder.

Solder the negative wire to the corresponding negative pin.

Solder the positive wire to the corresponding positive pin.

Put the batteries in the slots.

Test each board to make sure it turns on.

You just built your very own 18650 battery charger!