BikeMaster DLFP-14-BS Lithium-Ion Battery - One Size BikeMaster uses cylindrical cells with storage welding technology for high output and cranking amps This lightweight Lithium Ion Battery weighs one-third the weight of a lead acid battery BikeMaster Lithium Ion Batteries provide twice the service life over lead acid batteries The low self-discharge rate of Lithium Ion Batteries extend its storage period for up to one year BikeMaster Lithium Ion Batteries feature a two-year warranty