Unidentified app using excessive battery
Try going to Settings &gt; Storage &amp; USB &gt; Explore to see if you can find/delete anything left by Sygic Navigation.

You can also try rebooting the tablet into safe mode by pressing and holding the power button until the dialog box with Power off appears. Then, press and hold the on-screen "Power off" button until it prompts you about rebooting into Safe mode. See if your battery is okay in safe mode (test it for about a day). Note that in safe mode, you can only use the core apps that the tablet came with and no third party apps. To exit safe mode, just turn off and turn back on the tablet.

Hope this helps.