This is the Digipower TC-3000 Universal Battery Charger for Li-ion/NiMh/Ni-Cd Batteries. Universal Battery Charger Compatible with most li-ion digital cameras, camcorder, hand held devices, mobile phone li-ion batteries and NiMh AA and AAA. Micro Processor identifies 3.6V, 7.2-7.4V li-ion batteries and AA/AAA NiMh/Ni-Cd. Automatically adjusts the [+/-] poles to adjust charging. Controls fast and trickle charge accurately to ensure the batteries are charged fully. Low-voltage battery activation. Detects: Over-voltage, short circuit and defective batteries. Overcharge and overheat protection.