5" Note vs 10.1" Note: Unexplained Battery Consumption Diff

[PeteCress]

I charge my two Samsung Notes up to 100%, turn the screens off but do not shut down - and leave them like that for 10 hours.

The 5" Note/Phone's battery is down to 80% but the 10.1" Notes battery is at 98%.

5" Note has a Mugen 5400mAh battery. 10.1" Note has the stock 7000.

20% * 5400 = 1080......... 2% * 7000 = 140........ 1080 -140 = beeeeg diff!

GSM Battery Monitor Pro seems to be telling me that it's not the phone, although it is a player at 15% of usage.
.15 * 1080 = 54. 1080 - 54 - 140 = 886mAh unexplained (and probably wasted?).

Both devices have WiFi=On and GPS=On, and Bluetooth=Off. The 5" has Power saving mode = On.

Ideally, I'd like to get the 5" Note to where I can turn off the phone, leave it overnite, and still have 98 or 99 percent battery left. No particular functionality in that - except that it seems like a reasonable indicator of how much battery is getting wasted with the screen off.

Suggestions?

 

[Rukbat]

I don't know the tab, but check the CPUs, CPU speeds and amounts of RAM for starters. Some CPUs take more power than others, more speed takes more power and refreshing more RAM takes more power. (Also some RAM is more power-efficient than other RAM.) There are probably other hardware differences that account for anything left.