The Back-UPS Pro extended run battery pack keeps computer, network, or gaming systems running longer during a power outage. The BR24BPG sold separately, features four 9Ah 24-volt batteries that increase total runtime for convenience and peace of mind. The BR24BPG battery pack is compatible with BR1500G Back-UPS Pro UPS. The BR24BPG UPS battery pack is covered by a two-year limited warranty.