[Teclast X98 Air 3G] PeterTech:
EDIT: It has been reported that the following fix can cause the windows icon on boot menu to disappear if you have installed windows fresh from ISO, and maybe also in other circumstances, so try this fix at your own risk.

If the windows icon on boot menu disappear you can try run bcdboot c:\windows from your installation ISO at its command prompt (thanks to Al_Rider for the tip).

In worst case you have to reinstall windows.

I have an X98 Air 3g (C8J6) and after flashing Mirek’s Lollipop rom v6.0 using Mirek’s FLASH_tool v2.5 I got the inaccurate battery meter where it goes normally from 100% to around 45%, and then rapidly goes from around 45% to around 7%, and at last stays around 2% for a really long time.

I have done a lot of trial and error testing and have now found the cause for the inaccurate battery meter, and how to fix it on my (C8J6) device.

THE CAUSE FOR THE INACCURATE BATTERY METER:

I have found out that the only way I can reproduce the inaccurate battery meter is when I come from Teclast stock rom and then flashes Mirek’s Lollipop rom v6.0 using Mirek’s own FLASH_tool v2.5.

If I instead of using Mirek’s FLASH_tool v2.5 am using the Intel MFT tool to flash Mirek’s Lollipop rom v6.0 over a Teclast stock rom, I don’t get the battery meter screwed up.

I have found two ways to fix the inaccurate battery meter, and that is either flashing Teclast stock rom for your device, or using my modified XML files and replace them in Mirek’s Lollipop rom v6.0 before flashing:

HOW TO FIX BATTERY METER WITH TECLAST STOCK ROM:

If you can find a Teclast stock rom for your device you can use this method, and I don’t think it matters if its 4.4.4 or 5.0.

Boot your tablet up in android

Connect the charger

Turn off your tablet by holding the power button for 10 seconds

Leave the tablet to charge until you are sure it is charged 100%

Disconnect the charger

Boot the tablet up in DNX mode by pressing and holding the vol+, vol- and power button until small letters appear in the middle of the screen

Flash Teclast stock rom using Intel MFT tool, see TecKnight’s tutorial on how to use Intel MFT tool http://xdaforums.com/showpost.php?p=62823546&postcount=6

Boot the tablet up in android

You are now finished and hopefully your battery meter is working normally again, and when you flash a new rom ONLY use Intel MFT tool to flash.

HOW TO FIX BATTERY METER WITH MODIFIED XML FILES IN MIREK’S LILLIPOP ROM v6.0:

If you want to go straight to Mirek’s Lollipop rom v6.0, or you want to dirty flash without losing your data you can use this method.

Boot your tablet up in android

Connect the charger

Turn off your tablet by holding the power button for 10 seconds

Leave the tablet to charge until you are sure it is charged 100%

Disconnect the charger

Boot the tablet up in DNX mode by pressing and holding the vol+, vol- and power button until small letters appear in the middle of the screen

Download and replace this two modified XML files in Mirek’s Lollipop rom v6.0

flash-system_only_WIPE_DATA.xml

flash-system_only_NO_WIPE_DATA.xml

Flash Mirek’s Lollipop rom v6.0 with one of the modified XML files using Intel MFT tool, see TecKnight’s tutorial on how to use Intel MFT tool http://xdaforums.com/showpost.php?p=62823546&postcount=6

Boot the tablet up in android

You are now finished and hopefully your battery meter is working normally again in your favorite Mirek rom, and the next time you flash a new rom ONLY use Intel MFT tool to flash.

The things I have changed in my modified XML files compared to Mirek’s XML files is that I have added erase commands for (factory and config), wipe commands for (esp and reserved), and I have added flash commands for (esp and recovery), these extra commands are similar to the commands found in Teclast’s stock roms.

This is what I have found out by trial and error on my (C8J6) device, you can try it on your own device at your own risk, and if it is successful don’t forget to come back and hit the thank button, and leave a reply here for others to know if it works on your device too.

EDIT: It has been reported that the following fix can cause the windows icon on boot menu to disappear if you have installed windows fresh from ISO, and maybe also in other circumstances, so try this fix at your own risk.

If the windows icon on boot menu disappear you can try run bcdboot c:\windows from your installation ISO at its command prompt (thanks to Al_Rider for the tip).

In worst case you have to reinstall windows.