Dual Micro USB 3.7v to 5V 2A Mobile Power Bank DIY 18650 Lithium Battery Charger PCB Board Boost Step Up Module With Led
The AA313 Power Bank DIY Module efficiently converts 3.7V–4.2V lithium battery input into a stable 5V output with dual USB ports. It features LED power indicators, auto-shutdown, and built-in protection against overcharge, over-discharge, and short circuits, ensuring safe charging for multiple devices.
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