The Fenix ARE-X2 is dual-channel smart charger, built for different types, and different size, rechargeable batteries. The charger will automatically choose the correct charging mode for each battery type, whether it be Li-ion, Ni-MH or Ni-Cd. The ARE-X2 also features a USB port which allows you to charge other devices from charged Li-ion batteries on the unit (Ni-MH/Ni-Cd batteries cannot charge devices). FEATURES: --Compatible with different types and sizes of battery --Supports micro-USB charging and USB discharging to charge other devices --LED charging/discharging indicators --LED battery power indicator --Micro-computer chip controlled digitally regulated charging to extend battery lifetime --Short circuit protection, over-current protection, over-voltage protection and reverse-polarity protection. SPECIFICATIONS: Size: Length: 4.5" (115mm) Width: 2.5" (63mm) Height: 1.2" (30mm) Weight: 3.4 oz. (96g) excluding cable Battery Compatability: Li-ion batteries: 10440, 14500, 16340, 18650, 26650 Ni-MH or Ni-Cd batteries: AA, AAA Input: DC 5V, 1.5A (Max) Output: 5V, 1.5A: 18650, 26650 5V, 1.0A: 16340, 14500, 10440 PRC