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2. 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.

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. OLPC XO - Wikipedia

   en.wikipedia.org/wiki/OLPC_XO

   The first XO prototype, displayed in 2005, had a built-in hand-crank generator for charging the battery. The XO-1 beta, released in early 2007, used a separate hand-crank generator. [citation needed] The XO-1 was released in late 2007. [52] [53] Power option: solar panel.

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 ...

6. 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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