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2. Universal charger - Wikipedia

   en.wikipedia.org/wiki/Universal_charger

   Universal charger or common charger refers to various projects to standardize the connectors of power supplies, particularly for battery-powered devices. Since the publication of the USB Power Delivery standard in 2012, and the USB-C connector in 2014, USB-C has become a widespread standard for charging mobile phones.

3. Battery charger - Wikipedia

   en.wikipedia.org/wiki/Battery_charger

   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.

4. Chromebook - Wikipedia

   en.wikipedia.org/wiki/Chromebook

   Samsung Series 3 Chromebook. In October 2012, the Series 3 Chromebook was introduced at a San Francisco event with the Samsung Chromebook XE303. The device was cheaper, thinner and lighter than the Chromebook 550. Google marketed the Series 3 as the computer for everyone, due to its simple operating system (ChromeOS) and affordable price.