Schumacher"s Jump Starter has 400 Peak Amps of instant power with a 5Ah internal battery. The starter"s internal battery can be recharged by simply connecting an extension cord to the plug. Features sure-grip clamps to fit both top and side-mount batteries, with cables that stay flexible in cold weather. Battery Status LEDs tell you when the battery is charged or needs to be charged, and the 12 Volt accessory outlet has overload and short-circuit protection. Maintenance-free, sealed, lead-acid battery allows for storage in any position, with a compact, durable and corrosion proof polypropylene case.