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2. Sump pump - Wikipedia

   en.wikipedia.org/wiki/Sump_pump

   A secondary, typically battery-powered sump pump can operate if the first pump fails. A battery-powered secondary pump will have a separate battery and charger system to provide power if normal supply is interrupted. [citation needed] Alternative sump pump systems can be driven by municipal water pressure.

3. Basement waterproofing - Wikipedia

   en.wikipedia.org/wiki/Basement_waterproofing

   The drainage system collects any water entering the basement and drains it to an internally placed sump pump system, which will then pump the water out of the basement. The Federal Emergency Management Agency (FEMA) recommends basement waterproofing with a water alarm and "battery-operated backup pump" as a preventive measure against the high ...

4. Lead–acid battery - Wikipedia

   en.wikipedia.org/wiki/Lead–acid_battery

   Wet cell stand-by (stationary) batteries designed for deep discharge are commonly used in large backup power supplies for telephone and computer centres, grid energy storage, and off-grid household electric power systems. [26] Lead–acid batteries are used in emergency lighting and to power sump pumps in case of power failure.

5. Battery energy storage system - Wikipedia

   en.wikipedia.org/wiki/Battery_energy_storage_system

   A rechargeable battery bank used in a data center Lithium iron phosphate battery modules packaged in shipping containers installed at Beech Ridge Energy Storage System in West Virginia [9] [10] Battery storage power plants and uninterruptible power supplies (UPS) are comparable in technology and function. However, battery storage power plants ...

6. Backup battery - Wikipedia

   en.wikipedia.org/wiki/Backup_battery

   A backup battery provides power to a system when the primary source of power is unavailable. Backup batteries range from small single cells to retain clock time and date in computers, up to large battery room facilities that power uninterruptible power supply systems for large data centers. Small backup batteries may be primary cells ...

7. Uninterruptible power supply - Wikipedia

   en.wikipedia.org/wiki/Uninterruptible_power_supply

   The transformer has three windings, one for ordinary mains power, the second for rectified battery power, and the third for output AC power to the load. This once was the dominant type of UPS and is limited to around the 150 kVA range. These units are still mainly used in some industrial settings (oil and gas, petrochemical, chemical, utility ...