Tank formed plates; Sealed, Maintenance-Free design never need to add water; Valve-Regulated technology produces minimal amounts of gassing; Rugged, compact design; Multiple applications; Float or cycle use; Low self-discharge; Longer service life, lead calcium alloy provides longer battery life and performance; Absorbed glass mat (AGM); Nonspillable battery can be mounted in any position without danger of leaking electrolyte (upside down installation not recommended); SLA batteries develop no memory, whether used in cyclic or standby service.