1. AC Question's Avatar
    I have a TAC-70061 Denver tablet
    Android-version 4.1.1.

    It uses roughly 70% of the battery on Cell Standby - despite it being on airplane mode. The obvious problem here is of course the battery drain, as it oughtn't be necessary to use all the power on something which in reality does nothing. Does anyone know how to fix this?

    Also, no system update button on this, as it's a denver and they release (I think?) modified firmware? At least only updates to a few tablets from denver is available on their website.
    06-14-2014 12:12 PM
  2. B. Diddy's Avatar
    Welcome to Android Central! I'm afraid I'm not familiar with that brand. Is it a wi-fi only tablet? If there is no SIM slot for mobile data, it's baffling why there would be Cell Standby in the first place. When you say 70% of battery is taken by Cell Standby, is this figure from when the battery has mostly discharged?
    06-14-2014 12:51 PM
  3. emiltj's Avatar
    It's a wi-fi tablet only, and it has no SIM slot. I think I read that they used almost the same firmware (I think it's called?) for some tablets as they used on phones, and that's why.
    It doesn't have any usage on my tablet whatsoever though, and I wouldn't mind having the app, or whatever it is, removed or turned off, as I'm never going to use it. Would that be possible? If not, is there a possibility that there in fact is an update for my tablet, and that it would be fixed in a newer version?

    The 70% was indeed from when most of the battery was discharged, and that it's fully charged, it says 36% for Cell Standby, with 1 minute of run time.

    I thank you very much for your fast reply and appreciate you, using your time looking into this. Looking forward to your answer!
    06-15-2014 06:07 AM
  4. B. Diddy's Avatar
    It sounds like bad coding to me. If they're using firmware intended for a phone on a wifi only device, it may be that the system keeps looking for a nonexistent cell signal, which uses battery. Updates really depends on the manufacturer, and the lesser known ones generally don't support their devices very well. You could try contacting the manufacturer, but I wouldn't be too hopeful.

    The other option is to root the device and install a custom ROM, but there needs to be a big enough user community to support this kind of thing.

    Posted via Android Central App.
    Please excuse any typos or autocorrect derps.
    06-15-2014 07:19 PM
  5. B. Diddy's Avatar
    Found this on the Denver support page. You could try updating the firmware and see if it helps. Good luck! http://www.denver-electronics.com/fi...ver-tac-70061/

    Posted via Android Central App.
    Please excuse any typos or autocorrect derps.
    06-15-2014 07:21 PM

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