Battery Chargers MH-CD42 DC 5V 2.1A Mobile Power DIY Board 4.2V Charge/Discharge(boost)/battery protection/indicator module for lithium WattHour30 May 202230 May 2022 MH-CD42 is lithium battery charger 2.1A and discharger(3.5A) unit with battery level indicator LEDs, ON/OFF switch and