Restore power to your lithium-ion, NiMH, and Ni-Cd batteries with the compact ARE-X1+ Smart Charger from Fenix Flashlight. It's compatible with 18650, 26650, 16340, and 14500 li-ion cells, as well as AA, AAA, and C-size Ni-MH and Ni-Cd batteries. The unit features microchip-controlled, digitally regulated charging to extend battery life. It also contains a built-in circuit offering protection against overcharging, excessive current, short-circuiting, and reverse polarity. The unit runs on 5 VDC input power delivered via the Micro-USB port and included cable, which can be connected to various external power sources, such as USB adapters, computer USB ports, and power banks.