Key Specifications/Special Features:3-stages charging modes: Constant current (0.5+/-0.05A)Constant voltage (14.3 to 14.7V)Floating voltage (13.5 to 13.8V)LED indicate charging status: Red: in charging Green: fully charged Safety protections: Short-circuit protection Battery polarity error protection Over-voltage protection Lead-acid battery pack Suitable for 12VInput power supply: 100 to 240V AC, 50 to 60Hz/1.0AOutput voltage: 12V DC Charging current: 500mADimension: 74.0 x 28.0 x 42.0mmNo drain current from the battery when AC is off Certification: UL1310, CE and SAA 2 YEAR WARANTY A Must for Motorcycles, ATV, PWC, Lawn Mowers, Auto and More