Schumacher 50/10/2 Amp Fully Automatic/Manual Starter/Charger: * For users who want the features of a starter/charger with the added convenience of circuit-controlled fully automatic operation * Just hook it up, make the setting and forget about it, the charger knows when to stop * For 12V batteries * 50 amp engine start for emergency starting * 10 amp fast charge for everyday charging needs * Charges in 3 to 5 hours * 2 amp trickle charge charges a small 12V battery in 2 to 12 hours * Control circuit for fully automatic charging brings battery to full charge, then shuts off and starts again if battery condition starts to drop off from non-use * Back-lit, impact-resistant, color-coded meter for easy viewing day or night