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2. Heated clothing - Wikipedia

   en.wikipedia.org/wiki/Heated_clothing

   The 7.4-volt battery is the most common type of heated clothing battery system, and may be rechargeable. The most popular items sold have traditionally been heated gloves and jackets. 12-volt batteries are designed for use with motorcycles, ATVs, or snowmobiles, and draw their power from the vehicle's battery.

3. List of battery sizes - Wikipedia

   en.wikipedia.org/wiki/List_of_battery_sizes

   A common size for cells inside cordless tool battery packs. This size is also used in radio-controlled scale vehicle battery packs and some Soviet multimeters. 1 ⁄ 2-, 4 ⁄ 5 - and 5 ⁄ 4-sub-C sizes (differing in length) are also available. Soviet 332 type can be replaced with R10 (#4, 927, BF, U8) or 1.5 V elements from 3 V 2xLR10 packs ...

4. Electronic gear-shifting system - Wikipedia

   en.wikipedia.org/wiki/Electronic_gear-shifting...

   The switches send signals through a wiring harness to a battery pack, placed near the bottom bracket. The rechargeable lithium-ion battery pack supplies power to the derailleur motors, which move the derailleurs via worm gears. Shimano estimates that their 7.4-volt battery pack can last up to 1,000 kilometres (620 mi) per charge. [14]

5. The best back braces of 2025, according to experts - AOL

   www.aol.com/lifestyle/best-back-braces-185356472...

   Mueller Lumbar 4-in-1 Back Brace with Hot/Cold Pack. ... Material: Polyester, carbon fiber | Extra features: Rechargeable, three ... two-way power supply 7.4 volt, USB charger, Velcro battery ...

6. Radio-controlled car - Wikipedia

   en.wikipedia.org/wiki/Radio-controlled_car

   A soldering iron and supplies are often necessary to build high-performance battery packs or install upgraded electronics with low-resistance connectors. A Li-Polymer battery with a hard case is popular for RC cars, with the most common voltages being 7.4 V, which represents a 2S battery or 11.1 V, known as a 3S battery.

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.