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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.
Note that laptops on this system will still charge batteries. Modern laptop batteries, however include a temperature sensor that should compensate for the reduced cooling at altitude. This new system accepts various national power plugs and most laptop chargers will function properly at 120 V 60 Hz AC even if sold in 230 V 50 Hz AC markets.
80 Plus (trademarked 80 PLUS) is a voluntary certification program launched in 2004, intended to promote efficient energy use in computer power supply units (PSUs). Certification is acquirable for products that have more than 80% energy efficiency at 20%, 50% and 100% of rated load, and a power factor of 0.9 or greater at 100% load.
Standard may include a limit of 20 V at 7.5 amperes [5] Sometimes, there's a knurled retaining ring surrounding the male plug which allows fastening the plug to the chassis receiving the power. Some connectors have a right-angle connector, as seen in the picture. For aesthetics, some Dell laptop chargers have a glowing ring at the connector tip.
Battery Charging Specification 1.1 specifies that charging devices must dynamically limit bus power current draw during High Speed signaling; [53] 1.2 specifies that charging devices and ports must be designed to tolerate the higher ground voltage difference in High Speed signaling. Revision 1.2 of the specification was released in 2010.
A shunt charge controller or shunt regulator diverts excess electricity to an auxiliary or "shunt" load, such as an electric water heater, when batteries are full. [7] Simple charge controllers stop charging a battery when they exceed a set high voltage level, and re-enable charging when battery voltage drops back below that level.
Released in 2000, the Dell Inspiron 4000 was a lightweight laptop that Dell branded as "Ultra-Thin & Light" and "Light as a feather, strong as an ox". Its starting price was $1,499. Equivalent models of the 4000 were the Dell Latitude C500, C510, and C600. Processor: Intel Pentium III @650, 700, 800 or 850 MHz, or an Intel Celeron @600 MHz
USB-C plug USB-C (SuperSpeed USB 5Gbps) receptacle on an MSI laptop. USB-C, or USB Type-C, is a 24-pin, reversible connector (not a protocol) that supersedes previous USB connectors and can carry audio, video, and other data, to connect to monitors, external drives, hubs/docking stations, mobile phones, and many more peripheral devices.
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