NITECORE Intellicharger i4 Universal Automatic Smart Charger combo with 1 x NITECORE 3400mAh 18650 Rechargeable Li-ion Batteries, and LightJunction LED Keychain Light. Designed for NITECORE TM11 TM15 TM26 MT2C MT25 MT26 EC25 P16 P25 SRT5 SRT6 SRT7 etc Capable of charging 4 batteries simultaneously; Automatically stops charging when complete Automatically identifies Li-ion, Ni-MH and Ni-Cd rechargeable batteries Features three charging modes (CC, CV and Trickle Charge) Automatically detects battery status and selects the appropriate voltage and charge mode NITECORE 18650 batteries have more than 500 charge/discharge cycles