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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.
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.
Battery types such as the 9-volt have snap-on contacts. Battery holders for zinc-air batteries must not be completely air-tight since approximately 1 litre of air is required per ampere-hour of discharge per cell. The battery holder may include a valve integrated with the device power switch to allow air to be admitted when the device is ...
MagSafe is a series of proprietary magnetically attached power connectors developed by Apple Inc. for Mac laptops. MagSafe was introduced on 10 January 2006, in conjunction with the MacBook Pro, the first Intel-based Mac laptop, at the Macworld Expo.
Users have reported MagSafe Chargers leaving circular imprints on leather cases. [18] On September 9, 2024, Apple discontinued the original MagSafe Charger and replaced it with a second-generation model that provides up to 25 W of power with the iPhone 16/16 Pro and is compatible with the Qi2 standard for up to 15 W of power. Apple recommends a ...
The integrated webcam above the display has a camera resolution is 0.92 megapixel and its maximum video recording resolution is 1280x720 (HD) at 30 FPS. The battery of the laptop is a 2-cell prismatic battery with a voltage of 7.6 VDC. The power adapter bundled with the laptop is capable of 45w and outputs a 2.31 A.