Optmate 4 Battery charger. The new Optimate 4  battery optimiser has revised and upgraded state-of-the-art electronics that are designed to test charge and recover all 12 volt batteries even modern sealed types. Optimate 4 will continue to monitor the battery and keep a check on its performance delivering the right amount of charge at the right time every time. This is the Latest SP Version: New IP42 Splash Proof Case Internal Temperature Regulation Pre-defined Verification Stage for clearer diagnosis of battery problems Self Discharge Check to alert to shorted cells Improved maintenance current management Improved connection leads Will charge batteries where voltage is as little as 1V Delivered with two interchangeable connection lead sets, one with crocodile clips for bench charging the other with in-line protection fuse and eyelet terminals for permanent connection to the vehicles battery to allow easy reconnection of charger when necessary (i.e. M79-ACDRY weatherproof connector). UK spec fitted with standard UK three pin plug (220-240V 50/60Hz 12V battery voltage 0.6A output current). Two year manufacturer warranty .9 Manufacturer Endorsements  - 13 years development . Over 1,300,000 happy customers - 2008 MCN Product of the Year! 2009 British Dealer News Best Retail Product!