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  2. Freeplay Energy - Wikipedia

    en.wikipedia.org/wiki/Freeplay_Energy

    In present Freeplay radios and other products, clockwork mechanisms storing energy in a mainspring have now been replaced by small batteries charged by cheaper hand-crank generators. [9] Freeplay Energy produces a variety of consumer devices in addition to radios, including flashlights, lanterns, mobile phone chargers, and foot-powered generators.

  3. Battery charger - Wikipedia

    en.wikipedia.org/wiki/Battery_charger

    They may be fully compliant USB peripheral devices or uncontrolled, simple chargers. Another type of USB charger called "USB (rechargeable) battery" is fitted into the case of standard batteries (1.5 V AA, C, D, and 9 V block) together with a Li-ion rechargeable battery, voltage converter, and USB connector.

  4. Batteryless radio - Wikipedia

    en.wikipedia.org/wiki/Batteryless_radio

    Other ways of achieving the same function are clockwork radio, hand crank radio and solar radio, especially for the Royal Flying Doctor Service and School of the Air. [ 5 ] [ citation needed ] As part of an energy harvesting electronics system, some batteryless radios render electricity to storage by means of storage capacitors.

  5. Universal charger - Wikipedia

    en.wikipedia.org/wiki/Universal_charger

    In 2012, the USB Power Delivery (PD) specification was released. Power Delivery provides the ability for 5 V devices to draw more than 7.5 W of power (the limit specified by USB Battery Charging) from USB PD-aware ports when using PD-aware USB cables. The specification also allows PD ports to provide even greater power at higher voltages over ...

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  7. USB hardware - Wikipedia

    en.wikipedia.org/wiki/USB_hardware

    The Certified USB Fast Charger logo indicating support for the Programmable Power Supply (PPS) protocol in USB Power Delivery (PD) chargers. On January 8, 2018, USB-IF announced the Certified USB Fast Charger logo for chargers that use the Programmable Power Supply (PPS) protocol from the USB Power Delivery 3.0 specification. [70]

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