ELLEN TOOL Universal Single Slot Lithium Battery Charger 4.2V/500mA charging, Fit for 26650,18650,14500 Battery Automatically stops when battery reaches 4.2V Supports li-ion batteries with maximum diameter in 30mm and 71mm in length, which includes 18650,26650,32650 MAXIMUM SUPPORTED BATTERY LENGTH: 71 mm INPUT TYPE: AC 100~240V OUTPUT TYPE: DC 4.2V