WBD POWER 12V55ah Maintenance Free Storage Lead Acid Battery for Solar System/ UPS/Telecom Product Overview WBDP GS12550 is a high-capacity deep cycle sealed lead acid battery from our classic GS series. With large 55Ah storage capacity, net weight 16.3kg and standard cabinet size 229x138x208mm, this maintenance-free SLA battery delivers stable long-duration power output. It is the ideal energy storage backup solution for off-grid solar power systems, industrial UPS power