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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 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.
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.
A boost converter or step-up converter is a DC-to-DC converter that increases voltage, while decreasing current, from its input to its output . It is a class of switched-mode power supply (SMPS) containing at least two semiconductors, a diode and a transistor , and at least one energy storage element: a capacitor , inductor , or the two in ...
Stripper clip loading for a 7.92×57mm Mauser Karabiner 98k rifle. A device practically identical to a modern stripper clip was patented by inventor and treasurer of United States Cartridge Company De Witt C. Farrington in 1878, while a rarer type of the clip now known as Swiss-type (after the Schmidt–Rubin) frame charger was patented in 1886 by Louis P. Diss of Remington Arms. [3]
The first version of the MagSafe Charger, released in 2020, delivers up to 15 W of power to iPhones 12, 12 Pro, and newer, with the exception of iPhone 12 Mini and 13 Mini, which support 12 W. [12] The Wall Street Journal found the MagSafe Charger charged at half the speed of a 20 W wired charger. [13]
A 3-port solenoid-type boost controller A 4-port solenoid-type boost controller (used for a dual-port wastegate). The purpose of a boost controller is to reduce the boost pressure seen by the wastegate's reference port, in order to trick the wastegate into allowing higher boost pressures than it was designed for.
Animation of the Vickers muzzle booster operation, showing the expanding gases pushing the barrel to the rear relative to the cooling jacket. A Vickers-type muzzle (or recoil) booster, the "typical" type, consists of two parts: a flared "cup" on the muzzle of the barrel, and a perforated tube around the end of the muzzle, attached to the main body of the weapon.