Hahnel Twin V Professional Charger for the Sony, Panasonic & Leica Pro DSLR Digital Batteries Fast charger for 1 or 2 lithium ion batteries. 2 charge control systems with 2 LCD Displays - 1 for each battery Charge time approximately 1 to 2 hours, depending on battery Variable charge current battery overheating protection depending on battery capacity Twin V Pro converts to a battery tester when power is not connected Interchangeable battery contact plates, allowing the charging of different Li-Ion batteries from different SLR Cameras.