Renogy 12V 100Ah Smart Lithium Iron Phosphate Battery w/ Self-Heating FunctionThe Renogy 12V 100Ah Smart Lithium Ion Phosphate Battery w Self Heating is superior in cold climates. It's intelligent self heating function will automatically start operating once the battery's core temperature drops below 41F (5C). Uncompromising Quality: State of the art battery cells ensure a lifespan of more than 4000 cycles, 100A continuous discharge current, and a wide range of operation temperature. Self Heating Function: The intelligent self