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2. Battery charger - Wikipedia

   en.wikipedia.org/wiki/Battery_charger

   Battery charger. Charging a 12 V lead–acid car battery. A mobile phone plugged in to an AC adapter for charging. 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, current, for how long and what to do when ...

3. Inductive charging - Wikipedia

   en.wikipedia.org/wiki/Inductive_charging

   Inductive charging. The primary coil in the charger induces a current in the secondary coil in the device being charged. Inductive charging (also known as wireless charging or cordless charging) is a type of wireless power transfer. It uses electromagnetic induction to provide electricity to portable devices. Inductive charging is also used in ...

4. Rechargeable battery - Wikipedia

   en.wikipedia.org/wiki/Rechargeable_battery

   A battery bank used for an uninterruptible power supply in a data center. A rechargeable lithium polymer mobile phone battery. A common consumer battery charger for rechargeable AA and AAA batteries. A rechargeable battery, storage battery, or secondary cell (formally a type of energy accumulator), is a type of electrical battery which can be ...

5. Cordless telephone - Wikipedia

   en.wikipedia.org/wiki/Cordless_telephone

   A Panasonic KX-TG2226B 2.4GHz cordless phone with answering machine. A cordless telephone or portable telephone has a portable telephone handset that connects by radio to a base station connected to the public telephone network. The operational range is limited, usually to the same building or within some short distance from the base station.

6. History of the battery - Wikipedia

   en.wikipedia.org/wiki/History_of_the_battery

   Successive improvements in battery technology facilitated major electrical advances, from early scientific studies to the rise of telegraphs and telephones, eventually leading to portable computers, mobile phones, electric cars, and many other electrical devices. Students and engineers developed several commercially important types of battery.

7. Qi (standard) - Wikipedia

   en.wikipedia.org/wiki/Qi_(standard)

   The Qi standard is developed by the Wireless Power Consortium. [ 1 ] As a universal, open standard Qi-enabled devices are able to connect to Qi chargers from any manufacturer. Qi was first released in 2008, and by 2017 was incorporated into more than 200 smartphones, tablets and other devices. [ 3 ]