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2. Common external power supply - Wikipedia

   en.wikipedia.org/wiki/Common_external_power_supply

   The common EPS specification relies heavily on existing USB electro-mechanical standards – especially the USB Battery Charging Specification. By the mid-2000s, many mobile phone manufacturers (as well as manufacturers of other small battery-powered devices) had already begun designing their products with the ability to use a USB port's 5 V DC ...

3. ThinkPad T series - Wikipedia

   en.wikipedia.org/wiki/ThinkPad_T_Series

   Other changes include 4 GB of soldered memory accompanied by one SO-DIMM slot for expansion, as well as an M.2 2280 slot replacing the mSATA slot. Other features include PowerBridge, the combination of a 3-cell internal battery and a 3- or 6-cell external battery, replacing the UltraBay and slice batteries.

4. USB hardware - Wikipedia

   en.wikipedia.org/wiki/USB_hardware

   This feature has also been implemented on some laptop docking stations allowing device charging even when no laptop is present. [81] On laptops, charging devices from the USB port when it is not being powered from AC drains the laptop battery; most laptops have a facility to stop charging if their own battery charge level gets too low. [82]

5. USB - Wikipedia

   en.wikipedia.org/wiki/USB

   Micro-USB Cables and Connectors Specification 1.01; InterChip USB Supplement; On-The-Go Supplement 1.3 USB On-The-Go makes it possible for two USB devices to communicate with each other without requiring a separate USB host; Battery Charging Specification 1.1 Added support for dedicated chargers, host chargers behavior for devices with dead ...

6. Framework Computer - Wikipedia

   en.wikipedia.org/wiki/Framework_Computer

   Framework claims that the Chromebook edition has upgraded speakers and batteries compared to the standard laptop, but the speakers were described as "muffled" by ZDnet and the battery life was rated as quite poor for a Chromebook by ZDnet, Engadget, and PCMag. Engadget and PCMag criticize the price relative to other Chromebooks, but the former ...

7. Battery charger - Wikipedia

   en.wikipedia.org/wiki/Battery_charger

   When the voltage on the battery reaches its outgassing voltage (2.22 volts per cell) the charger switches to the second stage, and the voltage is held constant (2.40 volts per cell). The delivered current declines at the maintained voltage, and when the current reaches less than 0.005C the charger enters its third stage and the charger output ...