Mine is ten years old. It's a Chevy volt so it's a small battery and has over 3000 cycles and done 130000 km. It's at 87% original capacity.
I get the exact same as you with my s9fe and s9, 16h and 11h, equal screen off, 100% usage.
The s9fe's get great screen on battery time much better than s9's in my usage.
On my A9+ I turned my display down to 60hz had it since February battery life is excellent.
Have a Chevy Volt. The battery is only good for 22-40 miles depending on outside temp. It gets plugged in at night and costs $14-18 a month. For the past 3 years we have used less then 25 gallons of gas.
Not many cons. The car is much better on electricity than when the gas motor has to kick in. Much quieter and has a bit more throttle response so I don't like it when the battery runs out.
Mine gets around 4-5 hours of SOT. I do wish the SOT was better. The screen is dim so I have to up it to about 40% screen brightness which is a bummer because my previous tab s7+ was bright enough around 30%. I am satisfied with it but it doesn't meet expectations or the "ultra" name.
I noticed too, i mean, it's worse but it's not that bad, with the tab s6 I could do from 9 to 10 hours sot, sometimes even 12.
With the tab s7+ I can do 8-9 hours sot, so not that bad
I just bought a Tab A8 to replace my 6 year old Tab A6 and I am sad that the battery life is worse than the A6.
I used the tablet at night in bed for about 90 minutes to read news and I get 5 or 6 days use before needing a charge. The A8 lasts 2 days.
I have the same tablet and I can confirm that the battery life is quite bad. I am flabergasted how any who has done a 'review' on it managed to get almost 10 hours of battery.
I did a few battery rundown test with lowest and maximum brightness and I could not get more than 3-4 hours at best watching YouTube videos.
Was getting similar specs as op when a few days ago it seemed to have just lost its amazing battery life.
Went from 4 days w/o charge to about 1.5 days.
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