Windows 10: Sudden Drop in Battery Life

In the last two months, my laptop's battery life has absolutely plummeted. I bought my laptop Dell XPS 15 2021 almost a year ago to today and the battery life has been somewhere between 4 and 8 hours depending on my usage running windows 11. Since the beginning of September, I can barely squeak out 2 hours if I'm lucky. I checked the capacity during that time period and it seemed normal:But then I checked weekly battery life expectancy and my problem became apparent:I am a heavy user and my computer has a powerful i7-11th gen processor, so I wouldn't expect my battery to last more than 2-3 y

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Sudden battery drop to zero

I have Acer Nitro 5 AN515-52 laptop running 64 bit windows 10 version 21H1 (OS Build 19043.1165)I am facing an unusual battery drain to sudden 0. This began happening yesterday and happened again today. I suppose the battery drops to zero from 50-60%. There's no warning. The laptop just closes all of a sudden.Every time I work with my laptop plugged in the wall charging. I don't turn off the charging even it's full and continue to use it as it is. I only use my laptop on battery when I'm commuting, and that's exactly when I have faced this issue. I bought this laptop in April 2019. I'm enclosing the battery report html as a zip generated using Windows Powershell. Please suggest a solution.

battery-report.zip

 

Sudden battery drop to zero

It's right near the top.




If you had run a battery report when the battery was brand new, you would have seen its Full charge capacity matching its Design capacity. That ratio reduces as the battery gets used. Yours is currently 20034/48944 ≅ 40%

There's no generally-applicable magic number at which the battery is deemed to be too worn out for further use. In your case I think you'd make your decision based on time rather than charge level - it would be when the battery did not last the whole of your journey.

Denis

 

The battery life

Hi boerab61,

Battery life varies from phone model to phone model, even when they're from the same OEM. For instance, the HTC Titan II has a different battery life than a HTC HD7. However, your particular battery life can be varied depending on several factors:

• Strength of your phone carrier signal. If you're in areas of low or terrible coverage, then your phone will consume more energy trying to maintain a connection with a cell tower.
• High usage of GPS can also drain the battery quickly because the GPS sensor consumes a lot of energy. By the way, if you are using GPS a lot, you can actually improve battery life by leaving WiFi on, as Windows Phone can quickly pull geolocation info from
  WiFi routers, even if you're not connected to them.
  

With that in mind, here's some suggestions to try to extend the life of your battery.

Reduce the load on your battery:

• 
  Decrease screen brightness.
  
• 
  Set Timeout duration on Backlight.
  
• 
  Set Auto-Off Timeout duration for 1 minute or less (device turns off).
  
• Throttle down your CPU speed.
• 
  Remove external devices (SD Cards, etc)
  

Turn off appropriate radios on your device:

• 
  Turn off Bluetooth transceiver when not in use.
  
• 
  Turn off WiFi transceiver when not in use (except when using GPS).
  
• 
  Turn off GPS receiver when not in use.
  
• 
  Turn off Cell transceiver when not in use.
  

Change the way you do things with your device:

• Minimize media playback use.
• Minimize use of e-mail and browsing.
• 
  Once in a while (every few weeks), drain battery until dead, then recharge 100%
  
• Keep a spare charger in your car and/or office.
  

Again, these are the ways you can consume battery life and yes, some are extreme but if you're serious about conserving your phone's battery, these are some great suggestions.

I hope this helps!

David