Guest eccehom Posted January 13, 2011 Report Share Posted January 13, 2011 Hi. I’ve purchased this tablet a week ago and i have a battery issue. When i reach 50-60% discharged from 100%, and i turned the tablet off, on the next reboot the battery falls to 12-20%. But, if i use all the battery without turn it off, it runs normal. Any advice? Link to comment Share on other sites More sharing options...
Guest simonta Posted January 13, 2011 Report Share Posted January 13, 2011 Hi. I’ve purchased this tablet a week ago and i have a battery issue. When i reach 50-60% discharged from 100%, and i turned the tablet off, on the next reboot the battery falls to 12-20%. But, if i use all the battery without turn it off, it runs normal. Any advice? Sorry, but that's as clear as mud! :D and i turned the tablet off Did you power it off or suspend it? I'm guessing suspend as some battery was used but please confirm. on the next reboot Do you mean reboot or power on? How long did you leave it? if i use all the battery without turn it off, it runs normal. Sweet. You use all the battery and the Vega runs normally! Link to comment Share on other sites More sharing options...
Guest shadow wave Posted January 13, 2011 Report Share Posted January 13, 2011 I think this is the same problem I have. You have say 60% power left. You power off the vega completely by holding down the power button, selecting power off and pressing ok to the shut down message. The next time you turn it on you have say 20% power left. It claims to have lost lots of power while being completely off. Link to comment Share on other sites More sharing options...
Guest eccehom Posted January 13, 2011 Report Share Posted January 13, 2011 Sorry, but that's as clear as mud! :D Did you power it off or suspend it? I'm guessing suspend as some battery was used but please confirm. Power off. Do you mean reboot or power on? How long did you leave it? Power on. 5 minutes. Sweet. You use all the battery and the Vega runs normally! If i don't turn off the tablet (from 50-60% battery left), it discharges normally. I know, this is so weird, but it happend over 3 times yet. And happens only on 50-60%, i mean, do not on 40% or 70%. And always REINICIATE ON 12% or 20% when i TURN IT ON. !!!!!!!!!!???????? By the way, thanks :P Link to comment Share on other sites More sharing options...
Guest eccehom Posted January 13, 2011 Report Share Posted January 13, 2011 I think this is the same problem I have. You have say 60% power left. You power off the vega completely by holding down the power button, selecting power off and pressing ok to the shut down message. The next time you turn it on you have say 20% power left. It claims to have lost lots of power while being completely off. That's the problem. I'm running ROM r6 Link to comment Share on other sites More sharing options...
Guest simonta Posted January 13, 2011 Report Share Posted January 13, 2011 Okey dokey, got it. Unfortunately, it's a known issue with the battery indicator sometimes not updating properly. Quite a few posts about it already. Should be able to fix it when the kernel source (finally) gets released. Link to comment Share on other sites More sharing options...
Guest eccehom Posted January 13, 2011 Report Share Posted January 13, 2011 Okey dokey, got it. Unfortunately, it's a known issue with the battery indicator sometimes not updating properly. Quite a few posts about it already. Should be able to fix it when the kernel source (finally) gets released. Ok, i understand that this is not a battery problem. When the battery indicator marks 20%, I have the amount of battery that it marked when i turned it off. Am i right? Link to comment Share on other sites More sharing options...
Guest simonta Posted January 13, 2011 Report Share Posted January 13, 2011 Ok, i understand that this is not a battery problem. When the battery indicator marks 20%, I have the amount of battery that it marked when i turned it off. Am i right? Yes, after power on or a reboot, the indicator is right. Link to comment Share on other sites More sharing options...
Guest eccehom Posted January 13, 2011 Report Share Posted January 13, 2011 Yes, after power on or a reboot, the indicator is right. the indicator still marks the 'fake' number, no matter how many times i turn off/on the device. I mean, if the indicator marks 20%, when i reboot, it still marking 20%. The indicator is not right after the reboot or power on. Link to comment Share on other sites More sharing options...
Guest simonta Posted January 13, 2011 Report Share Posted January 13, 2011 the indicator still marks the 'fake' number, no matter how many times i turn off/on the device. I mean, if the indicator marks 20%, when i reboot, it still marking 20%. The indicator is not right after the reboot or power on. There is no "fake indicator". It simply doesn't update properly. If you reboot and it says 20%, that's what you've got. Link to comment Share on other sites More sharing options...
Guest wi-fli Posted January 14, 2011 Report Share Posted January 14, 2011 In my experience the battery indicator is very unreliable . I've had it run for an hour, showing 3% left! But when I tested video playing on a full battery it ran for 7 1/4 hrs which is roughly per spec. I'm hoping the indicator gets more accurate over time, maybe? Link to comment Share on other sites More sharing options...
Guest juliodt Posted January 14, 2011 Report Share Posted January 14, 2011 I think this is the same problem I have. You have say 60% power left. You power off the vega completely by holding down the power button, selecting power off and pressing ok to the shut down message. The next time you turn it on you have say 20% power left. It claims to have lost lots of power while being completely off. I have the same problem, I'm running r6 too. Which is battery life browsing with wifi? I bought the tablet three days ago and I can return it Link to comment Share on other sites More sharing options...
Guest wi-fli Posted January 31, 2011 Report Share Posted January 31, 2011 (edited) I have now "proven" (kind've scientifically) what I suspected, that the battery indicator often bears little relation to the true battery state. My Vega often displays this effect of a huge apparent drop in battery level after a "full" power off at middlish charge levels. But in fact the battery level is much higher than indicated. I tested this by fully charging, then running video player for an hour or two at a time, and noting the battery level, then rebooting and noting level again. After 4 hours of videos, the battery level was showing a bit higher than true, but after a reboot that dropped to 19% which was way lower than true. I proved that this was not actually a "real" loss of charge by then watching another 3.3 hours of videos followed by 6 hours standby and a reboot, at which point there was still a tiny bit of charge left. Oh, and after one reboot the reported charge level went up! Being an engineer I couldn't resist a graph: So don't despair if you think you've lost loads of charge, you probably haven't. I don't know if this effect (reported in numerous threads on this forum) is just a Vega thing, or and Android thing, or maybe it's just a Li-Ion thing. Electronics was one of those modules I only studied till I was allowed to drop it... Edited January 31, 2011 by wi-fli Link to comment Share on other sites More sharing options...
Guest telthenipper Posted February 5, 2011 Report Share Posted February 5, 2011 I'm seeing this issue too. It's well annoying. Is there any why to fix it? Link to comment Share on other sites More sharing options...
Guest wi-fli Posted February 6, 2011 Report Share Posted February 6, 2011 Not that I know of - it's still there in MCR v7 Link to comment Share on other sites More sharing options...
Guest QLF Posted February 7, 2011 Report Share Posted February 7, 2011 Not that I know of - it's still there in MCR v7 6 second hold on the power button to turn off rather than the 1 second then "Turn Off option from the soft menu fixes the problem. No idea why, but i don't lose battery power when i use this method... Link to comment Share on other sites More sharing options...
Guest wi-fli Posted February 7, 2011 Report Share Posted February 7, 2011 6 second hold on the power button to turn off rather than the 1 second then "Turn Off option from the soft menu fixes the problem. No idea why, but i don't lose battery power when i use this method... Thanks for that tip, sounds great. I'll try it when I get home! Link to comment Share on other sites More sharing options...
Guest Lennyuk Posted February 7, 2011 Report Share Posted February 7, 2011 All android devices tend to lose about 5% on boot, if yours doesn't then it will on the next reboot for sure. I have noticed that the vega often takes about 10 mins or so to show the true battery level once you turn it back on. I use the app "juice plotter" to keep an eye on the battery life on all my android phones that way you learn its behaviour and know what to expect. Link to comment Share on other sites More sharing options...
Guest matthijskox Posted February 7, 2011 Report Share Posted February 7, 2011 I still have about 5-8% drain during standby with r7 :P When i turn it off (holding power button for 6 secs), it remains stable. Anybody else with similar problems or do i just have a poor battery? Performance seems OK during use (not in standby thus). Link to comment Share on other sites More sharing options...
Guest QLF Posted February 7, 2011 Report Share Posted February 7, 2011 I still have about 5-8% drain during standby with r7 :P When i turn it off (holding power button for 6 secs), it remains stable. Anybody else with similar problems or do i just have a poor battery? Performance seems OK during use (not in standby thus). standy-by isn't "off", same as your TV, so using it will drain battery. Simple as that. If you want to conserve power, use the 6 second method, (would be good if someone could change this to 3 secs though). Link to comment Share on other sites More sharing options...
Guest wi-fli Posted February 7, 2011 Report Share Posted February 7, 2011 Is there any potential downside to the "hold the button down for 6 seconds" method of switching off (like killing the mains power on a Windows box can lead to problems)??? Any comments welcome, I'm pretty new to Android. Cheers Link to comment Share on other sites More sharing options...
Guest Lennyuk Posted February 7, 2011 Report Share Posted February 7, 2011 Is there any potential downside to the "hold the button down for 6 seconds" method of switching off (like killing the mains power on a Windows box can lead to problems)??? Any comments welcome, I'm pretty new to Android. Cheers the only real risk is that the sd card might corrupt if its in the process of a write, when you go power menu > shut down it unmounts the sd card before it shuts off which is why it takes a while. the 6-second method will just shut off, so you risk corrupting the card. Link to comment Share on other sites More sharing options...
Guest matthijskox Posted February 7, 2011 Report Share Posted February 7, 2011 (edited) standy-by isn't "off", same as your TV, so using it will drain battery. Simple as that. If you want to conserve power, use the 6 second method, (would be good if someone could change this to 3 secs though). I am aware of this, but 5-8& an hour is not normal in my opinion! Edited February 7, 2011 by matthijskox Link to comment Share on other sites More sharing options...
Guest QLF Posted February 7, 2011 Report Share Posted February 7, 2011 I am aware of this, but 5-8& an hour is not normal in my opinion! I think a lot of that is down to the accuracy of the app which monitors the battery level in the first place. Ignore the %'s, but hard power down will certainly fix the issue :P Link to comment Share on other sites More sharing options...
Guest obb Posted February 7, 2011 Report Share Posted February 7, 2011 It also depends whats running the background too ... For example Ebuddy absolutly kills the battery on standby as its constantly trying to poll the server whether it has a connection or not. Also why hold the power button down for 6 seconds? Why not just hold it down for a couple of seconds and choose Power Off ... its a far cleaner way of shutting down the Vega. Holding down the power button shuts the Vega down in an unclean manner and could lead to data corruption quite easily. Its like shutting down a Windows machine by holding the power button down ... do it enough times and you will badword your Windows install up eventually. Link to comment Share on other sites More sharing options...
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