Lead-acid batteries tailored for data centers have three merits: high compatibility, easy management and high safety. Made of V0 flame-retardant ABS shell, they meet computer room fire protection standards with anti-leakage sealing design, supporting vertical and horizontal cabinet installation to save space. Batteries have good capacity consistency with deviation below 5%, compatible with BMS system to monitor residual capacity, voltage and temperature in real time. They have stronger overcharge and overdischarge tolerance than lithium batteries with low operation difficulty. Their defect is irreversible deep discharge, so floating charge is required to stabilize rated capacity.