10pcs DC 5V 2.1A Mobile Power Diy Board 4.2V Charge/Discharge(boost)/battery protection/indicator module 3.7V lithium 18650
USD 4.39
10pcs DC 5V 2.1A Mobile Power Diy Board 4.2V Charge/Discharge(boost)/battery protection/indicator module 3.7V lithium 18650