Windows 10: Why is my Battery Life Estimate so Inaccurate?

submitted by /u/Imperator_Romulus476
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:)

 

Battery life estimates wrong

I have a Lenovo IdealPad and was reading a couple other forum questions about their laptops having battery estimate problems. These ranged from a loss of capacity after being off over night, such as mine losing over 15% even as the laptop was shut down overnight.
To a rapid drop which serious affects the estimated time left of a charge. I mean for example if using my laptop and it estimates my life as say 60% which translates to 3 hours 40 minutes but then 15 minutes later I am at 50% and 2 1/2 hours left? Doing the
same tasks and haven't changed brightness or anything?

This makes the battery estimates pretty much useless and how can I go from 87% capacity when I shut down my laptop to 70% capacity in the AM when I boot up? How can I loose over 15% capacity when the PC is off? Either some of us have some serious parasitic
drains on batteries and/or we have some serious issues with Windows being able to determine battery capacity. I've used laptops for years and for the most part battery life estimates have always been pretty stable and accurate. But lately I have noticed that
many laptops only show percentage left and not time left by default. Is this trying to conceal a inaccurate system? When I am charging my battery the estimates to full charge seem very accurate. So why are discharges so bad, that we now resort to percentages
rather then time ?

[Moved from: Windows / Windows 10 / Performance & system failures]

 

OS battery life hours estimate question

If you Generate Battery Usage Report in Windows 10 the battery life estimates there are based on actual observed drain. I see no reason why the taskbar icon wouldn't be based on observed drain too.

 

Enable or Disable Battery Life Estimated Time Remaining in Windows 10  




I tried getting the estimated battery time loaded several times and cannot get it to take. Seems like the registry entry made it ok and the ones that were to be taken out are gone. Did the reboots and all, just no go.
Any thoughts?