1. Android Central Question's Avatar
    Before it drained like 3% at night but after update it drains 30% at night. Before update battery life was good but after the update it drains fast when tablet is idle. I use Lenovo tab 4 10. I have nova launcher installed and no lwp. Yeah, in android 7.1 i had turned on scheduled power on off, but in andriod 8.1 I couldn't find this setting. I turn off the wifi, location, etc. On my tab.
    12-06-2018 10:56 PM
  2. B. Diddy's Avatar
    Welcome to Android Central! Try wiping the cache partition: https://www.hardreset.info/devices/l...recovery-mode/
    12-07-2018 12:33 AM
  3. spyros_koysis's Avatar
    I have the same issue. I did a hard reset but it didnt fix the problem. I fully charged it and after 2 days of NO USE (2mins on-screen time) it had 20%. They should release an update to fix the issue.
    12-07-2018 11:55 AM
  4. B. Diddy's Avatar
    You also have the Tab 4 10? My daughter's Tab 4 8 (which should have pretty much the same hardware and software) is doing fine with Oreo. Charge up to 100%, then let it drain to 20-30% with normal usage, without charging in between. Then show us:

    1. The main Settings>Battery screen.
    2. The fullscreen battery graph screen (which shows Awake time and Cell Signal Strength).
    3. The Screen category (to see total Screen On time).
    4. The Cell Standby category, if present (to see Time Without Signal).

    You might have to install a 3rd party battery monitor, like GSam Battery Monitor, to get the Cell Signal Strength graph.
    12-07-2018 01:07 PM
  5. topheranton's Avatar
    Also have this problem. 2 separate issues here, 1 is that the auto power off/on feature isn't in the update. This seems to be a factor contributing to excessive battery drain (I'd say at least 1/3 more drain, as I would usually have it off for 8 hours a day). The other issue is that on my device it seems system is the chief cause of battery drain, e.g., 7% battery drain over the 3 hours since charge.
    There's probably an app workaround for the daily power off/on. But it does seem that there's an increase on the power used by system in the updated firmware.
    03-13-2019 12:09 AM
  6. PLAY ZONE's Avatar
    When ever I keep my Lenovo tab 4 10 at night it discharges from 100 percent to 75-80 percent.
    08-10-2019 10:37 PM
  7. B. Diddy's Avatar
    Welcome to Android Central! It'd be helpful to see battery stats, as I outlined in post no. 4 above.
    08-11-2019 12:03 AM

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