How to Make Portable Magnetic 18650 Li-ion Battery Charger

（Materials required）配件表
inner diameter 18mm PVC pipe 内径18mmPVC管
TP4056 Charging Protection Board 充电模块 https://goo.gl/3Efg77
0.28 Inch Voltmeter 电压表头 https://goo.gl/Pb7Y8j
magnet*2 磁铁*2 https://goo.gl/mX37DB

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