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  2. Psion Revo - Wikipedia

    en.wikipedia.org/wiki/Psion_Revo

    If you replace with higher capacity, you will need to work out how much longer the device needs charging for. Ignore the battery meter on first charge. The (red) charging light turns off around 84%. It is not recommended to put either Revo models on charge when their battery is over 80% due to a sense in thermal change required around this level.

  3. List of Bose portable audio products - Wikipedia

    en.wikipedia.org/wiki/List_of_Bose_portable...

    It included a rechargeable battery that was rated at up to 8 hours of playback at moderate volume levels. [10] The rear of the device includes a 3.5 mm auxiliary input. [11] The appearance is very similar to its predecessor, [10] with the biggest change being the folding arrangement of the front cover. [12]

  4. USB hardware - Wikipedia

    en.wikipedia.org/wiki/USB_hardware

    To allow for voltage drops, the voltage at the host port, hub port, and device are specified to be at least 4.75 V, 4.4 V, and 4.35 V respectively by USB 2.0 for low-power devices, [a] but must be at least 4.75 V at all locations for high-power [b] devices (however, high-power devices are required to operate as a low-powered device so that they ...

  5. Hot swapping - Wikipedia

    en.wikipedia.org/wiki/Hot_swapping

    Hot swapping is used whenever it is desirable to change the configuration or repair a working system without interrupting its operation. [3] It may simply be for convenience of avoiding the delay and nuisance of shutting down and then restarting complex equipment or because it is essential for equipment, such as a server, to be continuously active.

  6. AOL Mail Help - AOL Help

    help.aol.com/products/new-aol-mail

    You've Got Mail!® Millions of people around the world use AOL Mail, and there are times you'll have questions about using it or want to learn more about its features. That's why AOL Mail Help is here with articles, FAQs, tutorials, our AOL virtual chat assistant and live agent support options to get your questions answered.

  7. Psion Series 3 - Wikipedia

    en.wikipedia.org/wiki/Psion_Series_3

    All Series 3 variants are powered by two AA battery cells which are easily obtainable, rather than having a specially shaped proprietary battery which are often difficult to replace. All have an internal backup battery in the form of an easily changed small button cell, which allows the main AA batteries to be changed while losing no data files.

  8. Button cell - Wikipedia

    en.wikipedia.org/wiki/Button_cell

    If a device seems to "eat up" batteries after the original supplied by the manufacturer is replaced, it may be useful to check the device's requirements and the replacement battery's characteristics. For digital calipers, in particular, some are specified to require at least 1.25 V to operate and others 1.38 V. [5] [6]

  9. USB On-The-Go - Wikipedia

    en.wikipedia.org/wiki/USB_On-The-Go

    USB OTG defines two roles for devices: OTG A-device and OTG B-device, specifying which side supplies power to the link, and which initially is the host. The OTG A-device is a power supplier, and an OTG B-device is a power consumer. In the default link configuration, the A-device acts as a USB host with the B-device acting as a USB peripheral ...