The Sealey SUPERBOOST180 Starter/Charger 180/40Amp 12/24V 240v has 3 charging rates. It has a 15.5A input start and 4.5A input charge. 20-400Ah battery range. Output Start Peak(EN):180A(120A). Output Charge Peak(EN):40A(25A). Output:12/24V. Combination units capable of both charging batteries and providing boost power to help start vehicles with flat batteries. Models feature easy-to-read ammeters and illuminated power switches. Circuitry is protected by a panel mounted fuse. Suitable for heavier garage use for engines up to 3litre capacity. Built in polarity protection.