1. Windows Central Question's Avatar
    If left on "sleep", it drains down to zero within 24 hours having been fully charged. 4 days ago it was left with power "shut down" but today I found it only 10% charged. Can this be prevented? Does draining to zero damage the battery if left unused for a significant period, eg during a holiday?
    02-27-2016 08:33 AM
  2. eusty's Avatar
    Sleep should use some battery, depending on the sleep state, but Shutdown and Hibernate will use no battery.

    You don't give a lot of info, but my guess is that it isn't actually going into the state you think it is.....or the battery is faulty.
    02-27-2016 08:40 AM
  3. RumoredNow's Avatar
    I believe there was a bug with Surface Book and Surface Pro 4 that caused such an issue... I also believe it was patched. If you have one of those devices make sure you have applied all updates. Microsoft finally fixes power woes on Surface Book and Surface Pro 4 | Windows Central

    If this is not your issue... We would really need some details. Device? OS version? Does it drain if left plugged into charger?

    If you need additional help or have more questions or details to share, please join the site so you can reply in this thread. See this link for instructions on how to join Windows Central.
    02-27-2016 11:44 AM

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