10 year block battery, type VLRA, sealed, rechargeable 10 year design life at 20° ambient temperature High performance grid plates (lead/calcium) Fleece technology ABS housing and cover Recessed poles with copper core, screwable inside Extremely low gassing, low self-discharge No transport restrictions 100% recyclable Maintenance-free over the entire service life The battery pack must not be stored without a battery charge for longer than 2 months after delivery. The battery pack must be connected to the system after 2 months at the latest. If these instructions are not followed, any liability or warranty claims will be rejected.