TecMate Optimate 2 Battery ChargerExtends life and improves performance of a 12V battery of a vehicle / or 12V battery operated system that is not in daily use. Use the included SAE-71 accessory to easily connect OptiMate 2 to the battery when-ever the vehicle is parked, for safe long term maintenance even in temperatures below freezing. OptiMate 2 senses the battery condition, recharges and then keeps the battery 100% ready, never overcharging, and provides power to the anti-theft alarm, display, on board computer, etc. OptiMate 2 is ideal for standby power applications, the interactive standby mode during long term maintenance reverts to full charge mode if it senses high current drain from the battery. OptiMate 2 is a true connect & forget charger and maintainer for all 12V batteries.Features: Extends battery life Maintains battery at 100% Safe long term battery care Extends life and improves performance of a 12V battery, mounted in a vehicle / craft or battery operated system that is not in daily use. Use the included O1 accessory to easily connect OptiMate 2 to the battery, whenever the vehicle / craft is parked for safe long term maintenance even in temperatures below freezing. OptiMate 2 senses the battery condition, recharges and then keeps the battery 100% ready, never overcharging, and provides power to the anti-theft alarm, display, on board computer, etc