Guest Lee Hiachi Posted October 27, 2015 Report Share Posted October 27, 2015 (edited) My Hudl 2 was updated to Lollipop less than a month ago and now this bug happens. My hudl 2 keeps showing -1% battery and no battery bar and every app that I install shows the same -1%.. Even when I go to the battery history, i can not understand anything. Does anyone know of this bug and is anyone able to help? Edited October 27, 2015 by Lee Hiachi Link to comment Share on other sites More sharing options...
Guest popoyaya Posted October 27, 2015 Report Share Posted October 27, 2015 From a recent article about battery calibration...How to calibrate Android device battery without root accessThe old 'fully charge and discharge' approach stands as one of the simplest ways to 'recalibrate' your Android battery. We've warned you in the past about low voltage problems in lithium batteries and the negative impacts of fully draining a battery on its lifespan and the same holds true here. But if your phone battery is causing you real problems, it's worth taking the risk.1. Discharge your phone fully until it turns itself off.2. Turn it on again and let it turn off.3. Plug your phone into a charger and, without turning it on, let it charge until the on-screen or LED indicator says 100 percent.4. Unplug your charger.5. Turn your phone on. The battery indicator will likely not say 100 percent, so plug it in (leave your phone on for this) and continue charging until it says 100 percent on-screen as well.6. Unplug your phone and restart it. If it doesn't say 100 percent plug the charger back in until it says 100 percent on screen.7. Repeat this cycle until it says 100 percent (or as close as you think it's going to get) when you start it up without being plugged in.8. Now, let your battery discharge all the way down to 0 percent and let your phone turn off again.9. Fully charge the battery one more time without interruption and you should have reset the Android system's battery percentage.Please remember that it is not recommended to perform this process all the time. Even when your battery is so dead your phone won't even turn on, your battery still has enough reserve charge to avoid system damage. But you don't want to poke the tiger with a stick. Perform this process once every three months at the most. If it is required more often than that you have bigger problems at hand.Put plainly: fully discharging a battery is bad for it. Trying to overload a battery is also bad for it. The good news is that charging batteries automatically shut off when their safe limit is reached and there's always a little in reserve even if your phone won't start. But again: do this only when really necessary, because it does have a negative impact on battery life. Link to comment Share on other sites More sharing options...
Guest Lee Hiachi Posted October 29, 2015 Report Share Posted October 29, 2015 From a recent article about battery calibration...How to calibrate Android device battery without root accessThe old 'fully charge and discharge' approach stands as one of the simplest ways to 'recalibrate' your Android battery. We've warned you in the past about low voltage problems in lithium batteries and the negative impacts of fully draining a battery on its lifespan and the same holds true here. But if your phone battery is causing you real problems, it's worth taking the risk.1. Discharge your phone fully until it turns itself off.2. Turn it on again and let it turn off.3. Plug your phone into a charger and, without turning it on, let it charge until the on-screen or LED indicator says 100 percent.4. Unplug your charger.5. Turn your phone on. The battery indicator will likely not say 100 percent, so plug it in (leave your phone on for this) and continue charging until it says 100 percent on-screen as well.6. Unplug your phone and restart it. If it doesn't say 100 percent plug the charger back in until it says 100 percent on screen.7. Repeat this cycle until it says 100 percent (or as close as you think it's going to get) when you start it up without being plugged in.8. Now, let your battery discharge all the way down to 0 percent and let your phone turn off again.9. Fully charge the battery one more time without interruption and you should have reset the Android system's battery percentage.Please remember that it is not recommended to perform this process all the time. Even when your battery is so dead your phone won't even turn on, your battery still has enough reserve charge to avoid system damage. But you don't want to poke the tiger with a stick. Perform this process once every three months at the most. If it is required more often than that you have bigger problems at hand.Put plainly: fully discharging a battery is bad for it. Trying to overload a battery is also bad for it. The good news is that charging batteries automatically shut off when their safe limit is reached and there's always a little in reserve even if your phone won't start. But again: do this only when really necessary, because it does have a negative impact on battery life. I attempted this method but on step 3, the hudl simply would not show me the amount of charge despite pressing the power button constantly. Do you have any other ideas? Link to comment Share on other sites More sharing options...
Guest popoyaya Posted October 29, 2015 Report Share Posted October 29, 2015 There's another way which involves deleting the battery stats log file from system, but I guess without root that won't work. Link to comment Share on other sites More sharing options...
Guest Lee Hiachi Posted October 29, 2015 Report Share Posted October 29, 2015 So is there nothing I can do? Link to comment Share on other sites More sharing options...
Guest popoyaya Posted October 29, 2015 Report Share Posted October 29, 2015 (edited) There are apps like the one below but they need root too. Hopefully Paul O'Brien will come up with a rooting solution soon. Does the tablet work ok apart from reporting wrong battery level?https://play.google.com/store/apps/details?id=com.nema.batterycalibration&hl=en_GB Edited October 29, 2015 by popoyaya edit Link to comment Share on other sites More sharing options...
Guest Lee Hiachi Posted October 29, 2015 Report Share Posted October 29, 2015 Yes, it works ok apart from the battery issue. Link to comment Share on other sites More sharing options...
Guest Jabbitt Posted October 29, 2015 Report Share Posted October 29, 2015 There are apps like the one below but they need root too. Hopefully Paul O'Brien will come up with a rooting solution soon. Does the tablet work ok apart from reporting wrong battery level?https://play.google.com/store/apps/details?id=com.nema.batterycalibration&hl=en_GB Many years ago I used this very app but it has all been debunked by a google engineer a while back.The battery stats file exists just to record how much each app is using the battery whist the device isn't charging.http://www.xda-developers.com/google-engineer-debunks-myth-wiping-battery-stats-does-not-improve-battery-life/ Link to comment Share on other sites More sharing options...
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