How To Fix HTC U12+ Fast Battery Drain When Using Mobile Data

The #HTC #U12+ is a premium Android device released last year that makes use of a patented Liquid Surface design that is IP68 certified. This phone has a 6 inch Super LCD6 display which is great to use for viewing various multimedia content. It uses a dual rear camera system, 12MP+16MP while under the hood is a Snapdragon 845 processor combined with 6GB of RAM. Although this is a solid performing device there are instances when certain issues can occur which we will be addressing today. In this latest installment of our troubleshooting series we will tackle the HTC U12+ fast battery drain when using mobile data issue.

If you own an HTC U12+  or any other Android device for that matter then feel free to contact us using this form. We will be more than happy to assist you with any concern that you may have with your device. This is a free service we are offering with no strings attached. We however ask that when you do contact us try to be as detailed as possible so that an accurate assessment can be made and the correct solution can be given.  

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How To Fix HTC U12+ Fast Battery Drain When Using Mobile Data

Problem: Hi, I have an HTC U12+ with rapid battery drain. It seems to be mostly only when using data or GPS, but it will drop from 100% to 0% in less than a half hour. The battery used to be able to last a full day, even with moderate data usage and GPS. The phone was purchased factory unlocked in October, 2018. It is currently running android version 8 . Tried updating to the new software version hoping it would fix the issue but it did nothing. I have tried factory resetting, using safe mode, uninstalling all apps not needed, turning down screen brightness, disabling apps from running in the background, charging new battery for 3 cycles after factory resetting phone, using high speed charge cable. Nothing has worked so far. The battery will drain even if the phone is not in use. The only time I can get the battery to last a full day is if it’s in airplane mode. Battery also lasts quite a bit longer if I just turn off the data, but it’s not useful to me to have the data off. The phone will also just kill itself and turn off suddenly sometimes when it reaches below 10%. Sometimes it will get really hot and reboot itself a bunch of times until I take the battery out. Could there be an internal part that just needs to be replaced?

Solution: Before performing any troubleshooting steps on this phone it’s best to make sure that it is running on the latest software version. If an update is available then I suggest that you download and install it first.

While this appears to be caused by a faulty battery already there’s a possibility that it is caused by a software glitch which we will be trying to check. Follow the troubleshooting steps listed below which are recommended for this particular problem.

Perform a soft reset

The first thing you need to do in this case is a soft reset which is usually performed when the phone is unresponsive but should also apply in this case as the software will be refreshed.

  • If the display is off, press the POWER button to turn it back on.
  • Press and hold the POWER button, and then tap Restart.

Check if the issue still occurs.

Start the phone in Safe Mode

There are instances when an app you downloaded can cause issues on the device. If an app is not properly optimized it might use up a lot of battery life causing this battery drain problem. To check if it is an app that is causing the problem you should try to start the phone in Safe Mode.

  • Turn off the phone.
  • Press the POWER button to turn the phone on.
  • When you see the HTC logo on the screen, press and hold VOLUME DOWN until you see Safe mode at the lower portion of the screen.

If the battery drain issue does not occur in this mode then it could be caused by an app you downloaded. Find out what app this is and uninstall it.

Wipe the cache partition of the phone

The phone system cached data is used to speed up the access to your phone apps. Sometimes this data can get corrupted which results in issues occurring on the device. To check if a corrupted cached data is causing the problem you will need to wipe the cache partition of the phone from the recovery mode.

  • Turn the phone Off
  • Press and hold “Volume down” then press and release “power”
  • After the black screen with red and blue text, release the volume key
  • In the menu, press “Volume down” repeatedly to highlight “Reboot to bootloader”
  • Press “Power” to select the option
  • In the bootloader menu, use “Volume down” to highlight “Boot to Recovery Mode” and press “Power”
  • Once in Recovery, press “volume down” to highlight “Wipe cache partition” and press “Power” again to confirm
  • At the “Reboot system now” highlight press “Power”

Try to check if the issue still occurs.

Factory reset the phone

One last troubleshooting step you should do is a factory reset which will revert your phone back to its default settings. Take note that your phone data will be deleted in the process so make sure to create a backup copy before proceeding with this.

  • Turn off your phone by pressing the Power key for a few seconds.
  • Press and hold “Volume down” then press and release “power”
  • After the black screen with red and blue text, release the volume key
  • In the menu, press “Volume down” repeatedly to highlight “Reboot to bootloader”
  • Press “Power” to select the option
  • In the bootloader menu, use “Volume down” to highlight “Boot to Recovery Mode” and press “Power”
  • In this mode select “Wipe data / Factory reset” by using Volume keys to scroll down and the Power button to confirm that.
  • Then choose “Yes–delete all user data” and press the Power key once.
  • When Recovery Mode pops up select “reboot system now” with the Power button.

Once the reset has completed do not install any apps in your phone just yet. Try to check first if the battery drain issue still occurs. In case it does then this could already be caused by a faulty hardware component, possibly the battery. The best thing to do right now is to bring the phone to a service center and have it checked.

Feel free to send us your questions, suggestions and problems you’ve encountered while using your Android phone. We support every Android device that is available in the market today. And don’t worry, we won’t charge you a single penny for your questions. Contact us using this form. We read every message we receive but can’t guarantee a quick response. If we were able to help you, please help us spread the word by sharing our posts with your friends.

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Chad Buenaflor

Chad has been in the tech industry since 2000. He has a degree in Electronics Engineering and is interested in the hardware and software side of technology. Initially working for a Japanese semiconductor company as a Test Engineer for nearly 10 years, he then pursued his passion for internet technology by working for the support team of Time Warner Cable then finally joining TheDroidGuy as one of their troubleshooting and tech writers. On his free time he plays his favorite games on his PC, Xbox Series X, and Android phone. Contact me at Email

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