Randomly powering off under low battery. Battery calibration issue?

[John]

Zoenphlux it depends on what matters to you.  I’ve had my unit set to the faster ram speed since about 4 minutes AFTER I got it and haven’t felt any reason to flip back.  It could be that every unit is a little different but I’ve yet to have my unit power down prematurely (even at the faster settings).  I’ve only taken it down to about 20% once or twice though so I can’t say it won’t EVER happen.  The other thing is I think I saw Chris mention that on his tablet it would happen EARLIER if he had a hard drive and other things plugged into the unit.  I never really plug anything into my unit besides a wireless AC dongle.

That being said, 10% in a benchmark is exactly that 10% in a benchmark.  I suspect you won’t likely “feel” it in most general use.  It’s something that is measurable but not necessarily very demonstrable to the actual user.  Worst case, set your ram at the high speed and if you ever need to use that last 30% of your battery flip back to the bios and turn it down.

[ohkis]

I am afraid to say but my unit repeats abrupt and random shut off regardless of having been set the ram speed at the factory default. The abrupt shut off seems to occur somewhere in the range 20-30% when the unit has been started using from the battery level above 50%. I have performed a few cycle of 1-hour charging (until the battery level exceeds 30%) and booting after the occurrence of the first abrupt shut off at 23%. The results show that the abrupt shut off still occurred on my unit but the battery levels at which the shut off occurred were below 20% almost around 15%. The program running on Windows10 each time was the only YouTube video playing on the Firefox browser. Although it may depend each single unit.

[Ben]

Re: stability – I had fair share of hearthstone games that I could have won auto shut down on me. Was quite annoying so I think I’m gonna keep it at the default clock speed

I left it to charge from 0-100% to calibrate the battery. I’ll report in tonight if any more hearthstone games go pear shape from the shut down.

 

i think there are afew strange strings, but the ones which I am willing to try are auto/800/1067/1600 for memory speed. I don’t understand what the remaining options in the bios are

 

 

[Jorge]

Today I’ve just played a video in Full HD for 5 min (https://www.youtube.com/watch?v=P5_GlAOCHyE) and the computer shutdown suddenly with 46% of battery, this is crazy!!! I’ve checked in the Bios and my memory ram frequency is set at 1067 Mhz, I have the Dual Boot model…

We need a solution from Chuwi!!

[will]

Doesn’t work for me either, my memory is at 1067 and still crashes at 20-30%

[Ben]

I played some games (hearthstone and kingdom rush) last night and couldn’t bring the battery down to 30% so I can’t update my findings. Didn’t shut down on me. The battery life is too good to run down in one evening.

 

i also did reflash my bios so maybe that helped because all my bios settings are back to default optimised values.

i also emailed Banggood but I doubt they will be helpful.

 

hopefully the problem stays gone. It’s a pretty good tablet

 

[kuko61]

Chuwi publish on the official forum a new dualboot BIOS.  In description is: … to solve the wifi disconnet issue, reboot issue….
Maybe it’s the solution for the “powering off” failure.
http://forum.chuwi.com/thread-1160-1-1.html

[Ben]

I think it worked. I played hearthstone non stop down to 35% at 50% brightness. Seemed ok. Anyone else give it a shot?

running the battery down is really tiring…. The battery life is too good haha

[Chris G]

kuko61 wrote:

Chuwi publish on the official forum a new dualboot BIOS. In description is: … to solve the wifi disconnet issue, reboot issue…. Maybe it’s the solution for the “powering off” failure. http://forum.chuwi.com/thread-1160-1-1.html

 

I would try it if I can download it. What’s the dropbox password?

Chris | Admin
Please support us and help keep TechTablets online. Affiliate revenue is used to pay for the server, studio apartment (Techtablets HQ) and buy new tech to review. Without it, this site would be dead.
Next up for review:
Ordered and waiting for my: BMAX S15 & Teclast F6 Plus
Currently testing: LG G8X & Redmi K30

[Chris G]

Nevermind it’s en.chuwi.com

Edit: Flash it and nothing has changed. Same build date and time. Testing now but my battery is at 90%, takes a long time to drain will report back if I can get it to power off.

Chris | Admin
Please support us and help keep TechTablets online. Affiliate revenue is used to pay for the server, studio apartment (Techtablets HQ) and buy new tech to review. Without it, this site would be dead.
Next up for review:
Ordered and waiting for my: BMAX S15 & Teclast F6 Plus
Currently testing: LG G8X & Redmi K30

[winston smith]

It is reported that Emily fom chuwi forum said about the 30% shutdown : “if battery go low, use usb hand power dynamo for full energy support”…

[winston smith]

[SanHayate]

I don’t have any issue when using the hi12 in windows just browsing internet on Edge. I can’t get to 5% without issue.

Are your hi12s shuting down only when watching videos or playing ?

The only problem that I have is that I need to restart the wifi connection manually when using my wifi usb dongle when I resume windows. It seems that the “latest” FW fixes a wifi issue, is it this one? Not willing to try to flash a FW and brick my hi12 if it doesn’t fix that.

[kuko61]

Maybe you flash old BIOS.

I attach screenshot – old and new BIOS – v221 vs v223

Attachments:

You must be logged in to view attached files.

[ohkis]

Yes, Chris G, it seems that nothing has not changed on the screen of the new BIOS except for the build date and time as kuko61 shows but it works fine at least for the abrupt and random shut off. I have tested and seen all the behaviours throughout my Hi12 Dual OS started at over 70% battery level to safely shut down to hibernate at 2%. Infamous abrupt shut down did not happen. It has been the first time for me since my first day of using it without the abrupt and random shut down in low battery. In addition, I set the RAM speed at 1600 MHz.

 

The unit continued to run without any problems and shifted to the battery saving mode at the battery level 21% and the pop-up window appeared to show low battery level at 6%. The pop-up window appeared again at 4% to give me a warning that the unit needs the power supply to be connected immediately. And at the same time a small red mark in the battery icon in the task bar appeared and started to blink until it stopped blinking at 3%. At the battery level decreased to 2%, the unit automatically and safely performed the shut down process to power itself off.

 

Thanks Emily and Chuwi for this solution though we should take it for granted.

 

I would like to put some memos for all the owners of Hi12 Dual OS who are going to flash theirs with this new BIOS.

 

1. Download the new BIOS file named “Lateset Dualboot Hi12 BIOS（remain KEY, solve wifi disconnet issue).rar.”
2. Unrar it into a folder you like.
3. Connect a USB stick drive to the USB 2.0 port of your Chuwi Hi12 Dual OS.
4. Format the USB stick drive with FAT32. It may not be necessary but I named the USB stick drive as “winpe” just in case. I think the “create bootable” option is of no concern. I formatted it with the built-in format function of Windows10.
5. Copy all the contents inside the unrared folder to the root of the USB stick drive. Please be careful not to copy the unrared folder itself.
6. Reboot your HI12 Dual OS. Press F7 key several times when you see “CHUWI” something on the screen.
7. Select to boot with your USB stick drive. Flashing starts automatically and you can see variety of messages passing away on the screen which include erasing, writing and verifying the data.
8. In my unit, the flashing finished when the screen showed a command prompt as if it wait for some commands to be typed in since I waited for a minute if something happens. It seemed that nothing would not happen. Therefore, I typed in “exit” into the command line and the unit reboot to Windows10 after showing the logo “CHUWI” a few times on the screen as I set my Hi12 Dual OS not to show OS select screen and directly boot into the OS used last time.

 

I cannot certify you the result but it worked perfect as far as I was concerned.

[Author]

Posts