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2. Backup battery - Wikipedia

   en.wikipedia.org/wiki/Backup_battery

   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 ; rechargeable backup batteries are kept charged by the prime power supply.

3. Uninterruptible power supply - Wikipedia

   en.wikipedia.org/wiki/Uninterruptible_power_supply

   The offline/standby UPS offers only the most basic features, providing surge protection and battery backup. The protected equipment is normally connected directly to incoming utility power. When the incoming voltage falls below or rises above a predetermined level the UPS turns on its internal DC-AC inverter circuitry, which is powered from an ...

4. Renata (battery) - Wikipedia

   en.wikipedia.org/wiki/Renata_(battery)

   Battery technologies offered by Renata comprise silver oxide (for wristwatches, calculators and small electronic toys, etc.), zinc air (for hearing aids), lithium (non-rechargeable, primary) (for computer battery backup, etc.) and battery holders, as well as lithium polymer (rechargeable, secondary) (for industrial use).

5. Labor Day Generator Sales 2023: The Best Deals on Portable ...

   www.aol.com/lifestyle/best-early-labor-day-deals...

   Retailers like Amazon, Walmart, and Tractor Supply Co. are offering up to 40 percent off portable generators during Labor Day, with the best-selling Champion 2,500-Watt Dual-Fuel model down to ...

6. List of battery sizes - Wikipedia

   en.wikipedia.org/wiki/List_of_battery_sizes

   A Battery: Eveready 742: 1.5 V: Metal tabs H: 101.6 L: 63.5 W: 63.5 Used to provide power to the filament of a vacuum tube. B Battery: Eveready 762-S: 45 V: Threa­ded posts H: 146 L: 104.8 W: 63.5 Used to supply plate voltage in vintage vacuum tube equipment. Origin of the term B+ for plate voltage power supplies.

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   Discover the latest breaking news in the U.S. and around the world — politics, weather, entertainment, lifestyle, finance, sports and much more.