KNACRO AC/DC 4.2V 1A Adaptor Lithium Battery Charger Single String Polymer Battery Charger 18650 Lithium Battery Charger Full Stop Automatically (4.2V 1A) Using high-quality components, intelligent dual IC program control circuit, chip motherboard design. Charger with the flow, overcharge, short circuit, lightning, temperature, pressure, electromagnetic field protection and other functions, constant current output, full stop automatically. 4.2V 1A lithium battery charger for the aircraft model aircraft, remote control airplanes, electric cars and other toy model aircraft / toys polymer battery pack. ABS plastic, exquisite appearance, high temperature wear-resistant and durable. Low loss, fast transmission, power supply with an output short circuit protection, overload protection, overheating protection.