This morning I tried to wake up my Venue 8 Pro, but it wouldn't wake up. I plugged it in and pressed the power button, but the battery LED would just flash orange. My guess was that the battery drained down to an extremely low level between the night of 1/8 and the morning of 1/10. And that's exactly what happened according to the battery report.
According to the chart, the capacity was still around 75% towards the end of Jan 8. The battery drained another 5% in 15 hours, which is what I expected. But then around 11:30 am on Jan 9, something called "Connected Standby" went crazy and drained a whopping 66% (12,101 mWh) over a period of 15 hours. By 2:33 am of Jan 10, the battery had only around 3% (649 mWh) left.
The energy drained normally until 11:30 am on Jan 9. Then it plummeted. It was on standby.
It was because "Connected Standby". 70% down to 3% in 15 hours! All while it was just sitting in my drawer while I was at work. I turned off wifi and bluetooth.
Consumed 12,101 mWh.
Did this ever happen to someone else? There's no way this is normal behavior. How could this have happened? Is standby mode in Windows 8 not like standby in Android or iOS? Could this be another bug? I already updated everything (bios, light sensor, touchscreen, etc.). I know I can just power it off when I don't use it since it powers on so fast, but it's just something I've never had to do with my old Android tablet.
The same for me. Unreasonably drains just for doing nothing.
Yesterday I uninstalled all the windows updates to install them again except the KB2883200 (said to be related to this problems). No difference.
After that I uninstalled all the software that could be a potential cause, avast, dell updates, my dell, etc. No difference. I went yesterday night at 60%, and 9 hours after it was at 20% just being there. Wifi must be on (bluetooth off) because if I turn it off, after few minutes it will not turn on and I can only restart the device.
Apart from that, all updates from dell are applied.
the powercfg /sleepstudy tells that for this 40% of drain battery in 8 hours I have the
- Dell Wireless 1538 902.11 a/g/n Adapter working the 100%
- Intel SD Host Controller (\_SB.SDHB) at 99%
- NCSI at 40%
- Intel SD Host Controller (\_SB.SDHA) at 24%
- WNS at 13%
*And this is added to the list of problems
- cannot turn off wifi, I will need to restart the tablet
- extra sensitive touch panel, I don't even need to touch it to type and double-type
Same exact problem -- although my DV8P doesn't wait to drain the battery -- as soon as I put it to sleep (or it goes to sleep on its own), the battery drain is like the last part of your graph.
I am about to return my device and tell everyone I know to avoid the tablet because this is INSANE!
Dell needs to get to the bottom of this AND FIX IT ASAP if they want me to retain any shred of confidence in their product(s).
With the following:
- uninstall de network driver
- not rebooting (otherwise it gets installed again)
- reinstalling again the 2 wifi drivers from dell (rebooting after each one)
- having to re-do the process one time because I did not have any connection and the devices were marked as "unknown"
I have had 2% of battery drain with 2-3h, wifi on. I have installed now the windows updates that in principle should not give any problems, but that they have marked as problematic by some people. Let's see how does it go.
I browsed a few other forums and read a few other threads regarding this issue, and some people said that they were able to reduce battery consumption by disabling the audio drivers.
According to this thread (http://en.community.dell.com/support-forums/mobile-devices/f/4586/t/19532187.aspx), the drivers prevent the device from entering connected-standby mode. Disabling it reduced the power consumption down to <1% over several hours, which is what it should be.
Another person said that they "solved" it by not pressing the sleep button to put the device to sleep, but to just let it go to sleep by itself. I'm a little skeptical about that, but it couldn't hurt to try so I'll do that tonight and see what happens.
I really hope Dell or Microsoft fixes this connected-standby issue. I don't want to return it because I like having a tablet that operates a full version of Windows, but so far, I spent more time doing stuff for this tablet than with it. It's stupid how high-maintenance this tablet it. The battery drained a large amount again last night on standby (27% over 6.5 hours). This time, the tablet still had some power left (62%), but I couldn't wake it up normally. I had to press and hold the power button for 10 seconds and force it to reboot. Absolutely unbelievable.
One poster noticed "normal" drain for several hours and then a precipice on power drain while the device was "visually asleep" (i.e., blank screen)
I appreciate the suggestion - but I'm really waiting on a definitive answer from Dell.
Putting mine to sleep vs. letting it go to sleep does not make any difference.
Audio states (enabled/muted/normal) make no difference in the battery drain when "asleep"
It is not MY responsibility to know what is or is not preventing my device from entering or not entering "connected standby" -- as it stands, this tablet is TRULY DISAPPOINTING
The Venue WiFi remains active during sleep, and WILL eventually deplete the battery over 24 ~ 48 hrs (even more rapidly if moved out-of-range from its established WiFi connection). This naughty behavior has been widely reported, and a lot of us are waiting for a firmware fix.
Meanwile my own work-around was to change the Power Button preference on battery power, to shut-down when pressed — from the default sleep when pressed. I left the setting as is, for when it's attached to the charger. Boot-up is extremely rapid, so there's no extra overhead as a result, but I do need to remember to press the button before it falls-asleep on its own!
Two Venue 8 Pro here. Exactly the same experience with both of them.
drahnier (Latitude 10, Venue 8 Pro 64GB, 2x Venue 8 Pro 32GB)