NITECORE i2 Intellicharge universal smart battery Charger (Ver. 2) For 18650 RCR123 AA 18500 14500 18350 16340 18700 with 2 x EdisonBright AA to D type battery spacer/converters (2 Bay version of i4) Automatically identifies Li-ion, Ni-MH and Ni-Cd rechargeable batteries Capable of charging 2 batteries simultaneously Each of the two battery slots monitors and charges independently Automatically detects battery status and selects the appropriate voltage and charge mode 2X EdisonBright AA to D battery converter spacers included. These allow use of rechargeable AA batteries in D battery equipment.