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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 and current, for how long and what to do when charging is complete—depends on the size and type of the battery being charged.

3. AC adapter - Wikipedia

   en.wikipedia.org/wiki/AC_adapter

   A battery eliminator is an adapter intended to allow a device intended for battery operation, such as a radio, to be operated from an AC outlet. [10] All radios, except crystal sets, used inconvenient and messy vacuum tube batteries until the mid- to late-1920s. Battery eliminators that plugged into light sockets became very popular. [11]

4. Automobile auxiliary power outlet - Wikipedia

   en.wikipedia.org/wiki/Automobile_auxiliary_power...

   The actual voltage, matching the car battery's voltage, will be approximately 12.5 volts when dormant (less in cold conditions), approximately 14.5 volts when the engine and the alternator/generator are operating (more when cold), and may briefly drop as low as 5–6 volts during engine start due to the high temporary battery current usage. [12]

5. Direct current - Wikipedia

   en.wikipedia.org/wiki/Direct_current

   Most automotive applications use DC. An automotive battery provides power for engine starting, lighting, the ignition system, the climate controls, and the infotainment system among others. The alternator is an AC device which uses a rectifier to produce DC for battery charging. Most highway passenger vehicles use nominally 12 V systems.

6. 25 of the best Walmart sales of the week: Apple gadgets ... - AOL

   www.aol.com/lifestyle/the-best-walmart-sales-of...

   More than 10,000 reviews on Walmart are obsessed with this stain-fighting tool. "After months of my kids trashing my car and spilling smoothies, milk, lemonade, etc., the backseats in my car ...

7. Power supply - Wikipedia

   en.wikipedia.org/wiki/Power_supply

   Fuses in power supply units may be replaceable by the end user, but fuses in consumer equipment may require tools to access and change. A circuit breaker contains an element that heats, bends and triggers a spring which shuts the circuit down. Once the element cools, and the problem is identified the breaker can be reset and the power restored.