How to Make USB Rechargeable 9V Li-Ion Battery

（Materials required）配件表
9V Battery 电池
Adjustable Step Up Charging Integrated Module 可调升压充电一体模块 http://bit.ly/2GR3PEs
102535Lithium Ion Battery 软包锂电池http://bit.ly/2ZIT7qT
SS12d00G4 Toggle Switch 拨杆开关 http://bit.ly/2DDr7f0
optical fiber 光纤
PCB Prototype for $2(Any color): https://jlcpcb.com/
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