UPS Module 5V 1A 3.7V 4.2V Li-Ion Battery Charge Discharge Board

Mini 2 In 1 3.7V 3.8V Li-Ion Li-Polymer Battery Charger & 4.2V To 3.3V 3V

Mini 5V 1A UPS Uninterrupted Output Module 2 in 1 Charge Discharge 3.7V 3.8V 4.2

Voltage Detection Module Relay Switch Charging Discharge Monitoring Protection

DC5V 2.1A Mobile Power Diy Board 4.2V Charge/Discharge(boost)/battery protection

3.2V LiFePO4 Battery Charge & Discharge UPS Module 5V 9V 12V DC DC Boost

High Efficiency Large Power DC 5V 6V 9V 12V 15V 24V UPS Module IN-OUT 3.7V 4.2V

3.2V LiFePO4 Battery Charge & Discharge UPS Module 5V 9V 12V DC DC Convert