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2. Battery charger - Wikipedia

   en.wikipedia.org/wiki/Battery_charger

   Australian and New Zealand power socket with USB charger socket 1.5 V lithium battery charger and its power cable See also: USB § Power , and ISO 4165 Since the Universal Serial Bus specification provides five-volt power, it is possible to use a USB cable to connect a device to a power supply.

3. Comparison of single-board microcontrollers - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_single-board...

   All digital pins are 5 volt tolerant. Teensy 3.2 adds a more powerful 3.3 volt regulator, with the ability to directly power ESP8266 Wifi, WIZ820io Ethernet and other power-hungry 3.3 V add-on boards. Teensy LC [201] PJRC: MKL26Z64VFT4 ARM Cortex-M0+ 48 MHz [201] 64 A lower cost version of the Teensy 3.1/3.2.

4. Quick Charge - Wikipedia

   en.wikipedia.org/wiki/Quick_Charge

   Quick Charge is a proprietary technology that can charge battery-powered devices, primarily mobile phones, at power levels exceeding the 7.5 watts (5 volts at 1.5 amps) supported by the USB BC 1.2 standard, using existing USB cables. The higher voltage available allows more power (watts) to be supplied through wires without excessive heating.

5. AC adapter - Wikipedia

   en.wikipedia.org/wiki/AC_adapter

   An AC adapter or AC/DC adapter (also called a wall charger, power adapter, power brick, or wall wart) [1] is a type of external power supply, often enclosed in a case similar to an AC plug. [2] AC adapters deliver electric power to devices that lack internal components to draw voltage and power from mains power themselves.

6. Power supply - Wikipedia

   en.wikipedia.org/wiki/Power_supply

   An external power supply, AC adapter or power brick, is a power supply located in the load's AC power cord that plugs into a wall outlet; a wall wart is an external supply integrated with the outlet plug itself. These are popular in consumer electronics because of their safety; the hazardous 120 or 240 volt main current is transformed down to a ...

7. DC connector - Wikipedia

   en.wikipedia.org/wiki/DC_connector

   Two different airline in-seat power supply system (ISPSS) standards for DC power have been used in the past. American Airlines in the past used an automobile auxiliary power outlet. Most other airlines that provide DC power use the smaller EmPower system, which has a 4-pin Hypertronics' D-series connector. It can supply 15 volts maximum 5 amperes.