Dual USB 18650 Battery Charger PCB Power Module 5V 1A 2.1A Mobile Power Bank Accessories For Phone DIY LED LCD Module Board Product Description The circuit board is connected to the battery negative B-, B + is the positive, do not connect reversed, connecting reversed will burn the board, the battery is connected in parallel Read more about Dual USB 18650 Battery Charger PCB Power Module 5V 1A 2.1A Mobile Power Bank Accessories For Phone DIY LED LCD Module Board[…]