An Amateurs guide to Battery Saving
1. Disable everything that you do not currently need, such as
- Data connection
- Rotation sensor
- Synchronisation, auto-location
- Don't use widgets especially not those which need constant updates
2. Delete / uninstall everything not needed, such as
- Timescape and all it's connectors to email, FB, Twitter, etc
- Gmail (use Email, no need to use Gmail)
- de-install all other Google bloat, such as Now, Hangouts, etc.
Root your phone and uninstall the above and more. Basically get rid of all Sony and Google bloatware. Or alternatively, learn how to flash another already trimmed Rom.
3. Disable everything you may need but you are not sure yet (that's in settings\apps). Install Greenify (download from Google Play), greenify apps that you downloaded.
4. Find a replacement for Task manager WITH option to close all programs at once
5. Generally, switch off auto-functions and use your phone manually, and don't install things which you think only you could use.
6. When you are ready trimming your phone and adjusting it to your needs, charge the battery to 100 % + 2 h. By using the phone normally allow it to deplete the battery uninterrupted, until the phone switches off itself. Repeat a second time. Afterwards the device is calibrated to your usage and battery. By far the biggest battery user will be your screen. Usage values in between 40 - 60 % are normal. At this stage it does make most sense getting used to a somewhat dimm screen. Therefore it does not make much sense to be too obsessed with software battery saving methods.
7. A last tip:
- Don't charge your phone always to 100 %. Charge it to somewhere above 90 %, and let it run down to 20 - 10 % before the next charge. Do a 100 % charge only occasionally.