Increase Battery Life (Possibly)


When I first got the Pine, I noticed in Battery Stats that there was a “Test Tools” process that would often consume a large percentage of battery. ¬†After a few charging/discharge cycles, my battery life got dramatically better, and sometimes Test Tools wouldn’t even be in the battery stats. BUT, it would come back sometimes.


Charlie Dryer said he had deleted his Test Tools from his Pine, with a dramatic battery life increase. I decided to do the same, and here’s how you do it!

Requires Root/Superuser. This shouldn’t affect your Pine negatively, but do so at your own risk. At the bottom of the post is the APK you’ll be deleting, if you want to put it back.

  1. Download / Install Root Browser from Play Store.
  2. Open Root Browser.
  3. Scroll down until you find “system” folder. Select it.
  4. Find “app” folder inside system folder. Select it.
  5. Scroll down until you find “TOOLS.APK“.
  6. Press and hold on TOOLS.APK until you get a pop-up that includes Delete.
  7. Select Delete. If Root Browser asks for SuperUser privileges, select GRANT.
  8. Reboot Pine, and Test Tools will no longer be trying to run on your Pine.


Here’s the backup of tools.apk, in case anyone wants it.

Solution for Pine headphone jack issue


Pine users have reported that some headsets and headphones (headset is considered a headphone with a microphone) don’t behave properly with their Pine. The Pine isn’t alone in this, as even Sony has had headsets that have the same issue.

There’s two headset standards, OMTP and CTIA. What I believe is happening is the pine uses OMTP, while the more recent standard is CTIA. Plugging a CTIA headset into a OMTP port will usually result in strange behavior (Like Google Now starting), or just not working at all.

The resolution is fairly simple, just have to use an adapter. Basically the converter will flip the GROUND and MIC poles on a 4-pole(3 black band) headset, so if the Pine is CTIA it should make your OMTP headset work, and vice versa… Like these below: