At "battery usage", how are Bluetooth and NFC displayed?

[anon(10000400)]

This weekend I made a test to see the impact of keeping Bluetooth and NFC always on (but I did not use them). As my use varies a lot (I can't keep only at "in the middle of the day my battery is always at x%, but now it is at y%"), I would use only the data displayed at "battery usage". I did not charge my phone up to 100% for three days, so the usage data would not reset. But, after this time (and during), when I opened "settings", entered "battery" and selected "battery usage" I could not find any Bluetooth or NFC indicator. I do not believe that those services simply did not consume any significant battery amount, so I think that they are displayed in common with other services (as "android system", "cell standby", "media server"... I don't know).
I do not have any power saving enabled, my settings are usually configured to prioritize usage and conectivity instead of battery (so nothing interfered with the test subjects).

Thanks!

 

[Tim1954]

If you open application manager, make sure system apps are showing, find the Bluetooth app and open it. Data and battery usage should be there...

 

[anon(10000400)]

If you open application manager, make sure system apps are showing, find the Bluetooth app and open it. Data and battery usage should be there...

Thanks, Tim!

I did this and found "Bluetooth MIDI Service", "BLuetooth Share" and "BluetoothTest", as well as "Nfc Service". In the BT case, I think the one I want is "BluetoothTest", since it's saying "2% used since last fully charged" (I have already recharged battery up to 100%, so...) and the others are just "none since device last fully charged". "Nfc Service" shows "0% used since last fully charged".

Oh, and I think Bluetooth is shown under "Android System" - I opened it and "BluetoothTest" is listed in the "Included packages". Not sure about NFC bacause it is not shown here, but I think it will appear here, too.

I'll redo the test and post it here.

Thank you.

 

[anon(10000400)]

So, after exactly 3 days, I got this:
Bluetooth MIDI Service - "none since device last fully charged";
Bluetooth Share - "none since device last fully charged";
BluetoothTest - "20% used since last fully charged" (6.67% per day, 0.28% per hour);
Nfc Service - "0% used since last fully charged".

It's important to note that I only kept Bluetooth and NFC enabled, but did not use them at any moment, so the shown usage is relative to keeping it enabled and nothing more.

EDIT: I can't say if those 20% was just for keeping BT on but without use, since I keep it enabled to improve location accuracy (Settings > Privacy and safety > Location > Improve accuracy > Bluetooth scanning). I have already disabled BT (before top charging, but kept "bluetooth scanning" enabled) and after 20h40m of a full charge, with 54% battery remaining, "BluetoothTest" is reporting "4% used since last fully charged". So probably some amount was being used by location services, not only to keep BT active.

 

[Rukbat]

It's also important to note that the "20%" Bluetooth test is 20% of the total consumed. Unless you're draining the battery to 0% (I can give you a link to a new battery if you intend to do that regularly - meaning for about a month, until the battery fails), that's not 20% of the battery.

 

[anon(10000400)]

Thanks, Rukbat. Well pointed!