Vapcell S4 Plus V3.0 Universal Fast Battery Charger 18650 20700 21700 Product Highlights: Max charge of 3A per slot, 12A Total Charge current options per slot of 0.25A, 0.5A, 1A, 1.5A, 2A, 2.5A, 3A Easy-to-read Display includes all the information you could ask for Compatible with 18650, 20700, 21700, 26650 and more including 21700 Protected Batteries Reverse polarity protection protects if cell is entered in the wrong way Packaging Contents: Vapcell S4 Plus battery charger DC Wall Adapter User Manual Specifications: Input – 12V / 5A Output Current – 0.25A, 0.5A, 1.0A, 1.5A, 2.0, 2.5A, 3.0A (12A Max) Compatible with: 3.6V/3.7V Lithium ion Batteries (Li-ion) Most Cylindrical Lithium-ion Batteries Ranging In Size From 10440 To 26650 including 18650, 18700, 20700, 21700, 22650, 25550 and 26650 Ni-MH/NiCd: AA, AAA, C, D