This dual Charger is compatible with not just 20700, 26650, 18650 Li-ion batteries (not include), but also most of cylinder shape rechargeable batteries, such as Ni-MH Ni-Cd A AA AAA AAAA C SC Battery, Li-ion LiFePO4 IMR INR ICR 26650 25500 18490 18500 18350 17670 16340 RCR123A 14500 10440 Batteries. Features: Fast battery charger with integrated LCD displays charging parameters and process (Battery type, voltage, time, charging percentage, charging capacity, auto alert indication for worse battery cell). Reverse protection, precision end-of-charge voltage detection, overcharging timeout protection. This battery charger can detect different battery types, it can smartly allocate current and voltage accordingly. That means it can charge different batteries at the same time. So it is very convenient for you to use. What's in the box 1 x Double Slot LCD Lithium Battery Charger 1 x Charging Cable