WBDP 6V 42Ah Rechargeable SLA Battery for UPS Units, Security Systems & Electronic Equipment Product Overview WBDP 6V42AH is a high-capacity valve-regulated sealed lead acid battery, built for long-duration standby power supply. Weighing 5.6kg with standard 194133 169mm cabinet size, this maintenance-free SLA battery delivers stable sustained discharge performance, ideal replacement for industrial UPS, large security alarm systems and heavy-duty electronic backup equipment.