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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.
The charger provides a constant current, typically the maximum current that the charger is capable of producing. As a result of this current, the battery absorbs a charge and its voltage rises. The charger limits the maximum voltage to U max , a constant or temperature-dependent maximum, typically around 2.4 V per cell.
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 and current, for how long and what to do when charging is complete—depends on the size and type of the battery being charged.
The Quick Charge 3.0 protocol supports finer-grain voltage levels with 0.2 volts steps and has a lower minimum voltage of approximately 3.3 volt. According to PocketNow , Quick Charge 3.0 starts at 3.2 volts with 0.2 volts between each step and goes up to 20 V (3.2 V, 3.4 V, 4.6 V, ..., 19.8 V, 20 V).
4.00 1.70 9.5 B EIAJ-02 3.15–6.3 V Kobiconn 3219-EX Lumberg 1636 02 Kobiconn 0311-EX (inline) Used in Lenovo Flex 4 adapter. Used for Sony PSP Charger (Input: 100-240VAC, Output: 5VDC @ 1500mA for PSP 1000, 2000, 3000) 4.5 3.0 0.5 12 19.5v Newer HP and Dell laptop computers 4.75 1.70 9.5 C EIAJ-03 6.3–10.5 V Kobiconn 3220-EX Lumberg 1636 03
Trickle charging is the process of charging a fully charged battery at a rate equal to its self-discharge rate, enabling the battery to remain at its fully charged level. This state occurs almost exclusively when the battery is not loaded, as trickle charging will not keep a battery charged if current is being drawn by a load.
Inductive chargers produce more waste heat than wired chargers, which may negatively impact battery longevity. [ 14 ] [ better source needed ] An amateur 2020 analysis of energy use conducted with a Pixel 4 found that a wired charge from 0 to 100 percent consumed 14.26 Wh ( watt-hours ), while a wireless charging stand used 19.8 Wh, an increase ...
An HVDC thyristor valve tower 16.8 m tall in a hall at Baltic Cable AB in Sweden A battery charger is an example of a piece of power electronics. Power grid designer in front of a newly installed 880kV thyristor valve array A PCs power supply is an example of a piece of power electronics, whether inside or outside of the cabinet.