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Xcluma dual micro usb 3.7v to 5v 2a mobile power bank DIY 18650 lithium battery charger pcb board boost step up module features: 100 percent high quality and branded 18650 dual micro usb 3.7v to 5v 2a boost mobile power bank DIY 18650 lithium li-ion battery dual micro usb booster board feature led lights show the power, non-working state of intelligent automatic shutdown dual usb output. Built-in lithium battery protection ic, over-current, overvoltage, under voltage protection18650 lithium li-ion battery dual micro usb booster board parameter input port: Microusb (Andrews mouth) input requirements: 5v constant voltage power supply can be done to charge the input power supply
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