Specifications: Charges 36V NiMH / Nicd battery packs with capacity > 1800mAh Charging current: 1.8A pulse current. Dimension (HxWxL): 2.7"(69mm) x3.6"(91mm)x 5"(127mm) Weight: 1.3 lb (590 grams) Brand: Power Portable Features: Universal Smart Charger Detect Minus delta V ( > 6 mV/cell) to cut-off power when battery is fully charged Detect temperature rising rate. ( dT/dt) If battery pack temperature rises too fast, (>0.5oC/60S)the charger will reduce charging current. Detect battery pack's max. temperature (T max.). If pack's temperature >70oC, the charger will cut-off power. Over charge protection Reverse Polarity protection. 3 pins female cannon connector is installed with the smart charger. Included 1 pcs connector adaptor, from 3 pin male cannon connector to Alligator clip with 10K thermistor ( 70oC) for connect to battery pack