NWZ A844 Battery backup ? EQ = On all other stuff off

[Damon88]

I think since the day i purchased my walkman im wondering if i have a faulty unit or something.

I know in order to get 28~ hours of batt backup ill need to turn off everything and also keep key activity to minimum.

I never actually get a backup of anything above 14 hours since the day i got it. Maybe im just changing tracks all the times and that causes that hit on batt timings.

Since the battery drain is linear and so does the battery indication on walkman screen.
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Can anyone tell me how long does it take to drain 2 notches of batt. indication at these settings:

Eq = On (clear bass +3 , 1,1,0,-1,+2)
dsee = off , vpt = off , normalization = off , clear stereo = off
Brightness = 3 , Screen on time = 15 seconds
NC = off

Playback mode = Shuffle and repeat

I kinda press next key for a few times 4-5 for skipping tracks i dnt wana listen. Then i do nothing for almost all duration of song.

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How long should those 2 notches last if this is the setup ??