It is a better solution than 18650 shield which could charge and discharge at 3A. It also has 4 LEDs to show the charging status and dump energy. It could detect target when the output current is less than 30mA the board will shut off automatically. The sleeping current is only 6 uA.
When you click once the button, charging work will start and LEDs will show the dump energy. When you keep clicking the button over 2.5s, output will stop.
I have made a 18650 shield and sell it for a long time. The direction of 18650 battery base is wrong and not performs so good. So I decide to stop selling this 18650 shield and release a better solution for 18650 battery. 3A charging and discharging will be very helpful for a lot of projects. It could save you a lot of time.
Be careful of "+" and "-", You should follow the direction of "+""-" on the PCB.
This product does not include 18650 battery
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