After a year of product research and testing Poweroad have released Lithium battery. ~ Low self-discharge rate less than 5% per month, can still start vehicle after 12 months with no charging. ~ Built in equalizing charge protection circuit, protects battery from. As for the battery's specs, the PLFP-10S cells have lost a cold cranking amperage (CCA) of 280 and are rated at 12 volts with a capacity of 48 watt-hours. ~ Must us a battery. Download all essential documents for energy storage systems, lithium batteries, and power solutions in one convenient place. Non toxic, no acid, no heavy metals can be installed in any. More than 4X longer life than lead acid battery. Outstanding cold crank power that outperforms other products.