The Game Boy Color USB-C Charging Kit is a circuit that allows you to charge a Nintendo Game Boy Color by USB-C and use a Li-ion battery instead of AA batteries.

This circuit includes the famous TP4056 and DW01A. The first one is the device in charge of charging the battery, and the second one is protecting the lifetime of the battery of the over-discharge.

This kit includes two boards. If you want to install it easy, it's enough with the main board which doesn't need any cable for working. However, if you want to have the status LEDs in the same place as the original status LED, then you will need to solder the second board and joint both with 3 cables. You can choose the best option for you.

This is the maind board:

And this one is the LED board:

Game Boy Color USB-C Charging Kit (Installation)

A small demostration about how this works:

(red light = charging, green light = finish to charge, white = GBC is power on)

Battery test: 1500 mAh = 8h 40m

https://shop.giltesa.com/product/game-boy-color-usb-c-charging-kit/

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Check the LICENSE.md for more information.