Crafted from high-grade lithium iron phosphate, the UT-1300BT-H battery outperforms lead-acid options for storage or auxiliary power. It lasts longer, needs no maintenance, charges 15% faster, weighs 23 lbs., delivers 150A continuous output, works in cold weather with a self-heating system, and offers BluetoothA(R) monitoring from your phone.NOTICE: For auxiliary power only. Not for use as a starter battery. See manual for detailsNote: The Lion UT 1300 BT-H requires an external charging source (connected to a live current) in order for the auto-heating element to function.