ESYB S6 Universal Battery Charger Intellicharger Speedy Smart Battery Charger 6 Bay/Slot for Rechargeable Batteries Li-ion, Ni-MH, Ni-Cd,10440 14500 16340 18650 26650 A AA AAA Capable of charging 6 batteries simultaneously 1A and 0.5A option charging current for choice according to different slots 6 blue LEDs indicate charging progress for each battery Activation function for Li-ion batteries with protection board Anti-reversing protection. Short-circuit protection. Over-current protection. Over-voltage protection. Overtime prevention