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2. Battery charger - Wikipedia

   en.wikipedia.org/wiki/Battery_charger

   A battery charger, recharger, or simply charger, [1] [2] is a device that stores energy in an electric battery by running current through it. The charging protocol—how much voltage , amperes, current, for how long and what to do when charging is complete—depends on the size and type of the battery being charged.

3. The 6 best cellphones for seniors in 2025 - AOL

   www.aol.com/lifestyle/best-cellphone-seniors...

   Best overall phone for seniors Lively Jitterbug Smart3 Smartphone for Seniors. $92 at Amazon. Best affordable Android phone Samsung Galaxy A23 5G. ... Battery life and backup chargers: ...

4. Backup battery - Wikipedia

   en.wikipedia.org/wiki/Backup_battery

   Additionally these batteries power the remote cellular phone systems that thwart phone line snipping as well. The backup battery usually has a lifespan of 3-10 years depending on the make and model, and so if the battery runs flat, there is only one main source of power to the whole system which is the mains power.

5. Quick Charge - Wikipedia

   en.wikipedia.org/wiki/Quick_Charge

   For instance, a single battery requests 8.8 V; the dual cell can then ask the PPS charger to output 17.6 volts and split it in half to the two separate batteries, providing 5.6 amps total to achieve 100 watts. The first phone supporting this technology was the Xiaomi Mi 10 Ultra. [11]

6. 15 products to help you stay cool in the extreme heat: 'A ...

   www.aol.com/lifestyle/products-to-help-you-stay...

   This handy number also boasts 21 hours of battery life, a backup charger and it's a flashlight! Nearly 42,000 five-star Amazon shoppers agree this dynamo is one to toss in your tote ASAP.

7. Lithium-ion battery - Wikipedia

   en.wikipedia.org/wiki/Lithium-ion_battery

   A lithium-ion or Li-ion battery is a type of rechargeable battery that uses the reversible intercalation of Li + ions into electronically conducting solids to store energy. In comparison with other commercial rechargeable batteries, Li-ion batteries are characterized by higher specific energy, higher energy density, higher energy efficiency, a longer cycle life, and a longer calendar life.