20PCS CD42 DC5V 2.1A Mobile Power Diy Board 4.2V Charge Discharge(Boost) Battery Protection Indicator Module 3.7V Lithium 18650
USD 14.58
20PCS CD42 DC5V 2.1A Mobile Power Diy Board 4.2V Charge Discharge(Boost) Battery Protection Indicator Module 3.7V Lithium 18650