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  2. Solar charger - Wikipedia

    en.wikipedia.org/wiki/Solar_charger

    A solar charger is a charger that employs solar energy to supply electricity to devices or batteries. They are generally portable. Solar chargers can charge lead acid or Ni-Cd battery banks up to 48 V and hundreds of ampere hours (up to 4000 Ah) capacity. Such type of solar charger setups generally use an intelligent charge controller.

  3. Wireless security camera - Wikipedia

    en.wikipedia.org/wiki/Wireless_security_camera

    Analog wireless is found in three frequencies: 900 MHz, 2.4 GHz, and 5.8 GHz. Currently, the majority of wireless security cameras operate on the 2.4 GHz frequency. Most household routers, cordless phones, video game controllers, and microwaves operate on the 2.4 GHz frequency and may cause interference with a wireless security camera.

  4. These popular security cameras are solar-powered — and they ...

    www.aol.com/lifestyle/popular-security-cameras...

    Forget changing out batteries all the time — these cameras are fueled by the sun. These popular security cameras are solar-powered — and they're $100 off at Amazon, today only Skip to main content

  5. Wireless power transfer - Wikipedia

    en.wikipedia.org/wiki/Wireless_power_transfer

    When the phone is set on the pad, a coil in the pad creates a magnetic field [1] which induces a current in another coil, in the phone, charging its battery. Generic block diagram of a wireless power system. Wireless power transfer (WPT; also wireless energy transmission or WET) is the transmission of electrical energy without wires as a

  6. Inductive charging - Wikipedia

    en.wikipedia.org/wiki/Inductive_charging

    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 vehicles, power tools, electric toothbrushes, and medical devices.

  7. Wireless Emergency Alerts - Wikipedia

    en.wikipedia.org/wiki/Wireless_Emergency_Alerts

    An example of a Wireless Emergency Alert on an Android smartphone, indicating a Tornado Warning in the covered area. Wireless Emergency Alerts (WEA), formerly known as the Commercial Mobile Alert System (CMAS) and, prior to that, as the Personal Localized Alerting Network (PLAN), [1] is an alerting network in the United States designed to disseminate emergency alerts to cell phones using Cell ...

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