22154697 ONLITE central ACCU Pb/10 12V 28Ah 10-year monobloc battery; VRLA battery, sealed, rechargeable 10 year design life at 20° ambient temperature Lead/calcium grid plates for high power performance absorbent glass mat technology ABS resin housing and cap countersunk poles with copper core, internal screw-fitting extremely low gas emission, low self-discharge no transportation restrictions 100% recyclable maintenance-free over the entire useful service life The battery set must not be stored for longer than 2 months after delivery without being charged. The battery set must be connected to the installation within 2 months at the latest. Any liability under warranty will not be accepted unless these instructions are followed.