5

My laptop is 9 months old. In which I sparsely use the battery of the laptop as I am connected to the power outlet most of the time. This problem has started since 4 days. As per this post my system was running only on power outlet. So there’s no question of the battery wearing out.

Every time the previous night the battery is full 100% and the next day morning when I turn on it shows 3Hrs 18Mins to full charge.

I tried to run the eSPA diagnostics but I cannot access it on Windows 10. Asked in the Dell Community and their solution is to go for the online diagnostic scan which doesn’t complete; it fails after 1 hour.

After some Updates of Windows 10 I got the F12 to start and the EPSA Diagnostic scan passed,the thermals for CPU Thermistor was 52C, the System didn't shut down even after the complete turn Off(i.e I came to know about this recently when my Laptop Bag was Hot and when I removed the Laptop outside it was showing a yellow status light for the battery this was even after doing a Complete Shutdown)

  • Like this answer explains, sometimes batteries are duds even if the machine is new. So if you are still under warranty, have the machine serviced to fix the battery issue. Could be as simple as a tech removing the old battery and replacing it with a new one. – JakeGould Aug 31 '15 at 13:49
  • Was the battery removed/disconnected from the computer? If not, then it WAS used not so sparsely. – Agent_L Aug 31 '15 at 14:40
  • Also – leaving a battery plugged in all the time can make this happen. It should be power-cycled at least once a month (well, depends on the battery). – Micah Walter Aug 31 '15 at 15:04
  • @Agent_L: You're confusing ageing with using. It will have aged faster due to being stored at full charge. It won't have been used in terms of charge cycles. – qasdfdsaq Sep 3 '15 at 15:58
  • @qasdfdsaq By "used" I meant "worn out", because OP made that assumption. And this is the assumption I point out as wrong. Also, your assumption is wrong too, because the battery will always self-discharge, and the laptop will top it up. So it will be "used" in the "charge-discharge" meaning (slowly but steadily). – Agent_L Sep 4 '15 at 8:33
11

Batteries can and do fail for all kinds of reasons. Although most laptop users get "a year or two" out their batteries, some last noticeably longer, and a few die in much less time. I don't know if it's strictly a bell curve, but it's that sort of principle: A variance (quite a bit of variance) around an average.

The most likely explanation here is that your battery has developed a weak cell. This can happen even with relatively new batteries after very little use, particularly if the laptop's configuration is such that the battery is kept warm by the rest of the laptop.

The only practical cure is to replace the battery. Since your laptop is only nine months old, it may be covered by warranty.

It is possible that the charge management hardware in your laptop is at fault, and is thinking "the battery is charged" and stopping charging when it is not really charged. This would clearly be a warranty issue too.

In any case the only way to diagnose it is to try a different battery.

Sorry about that, but it happens.

n.b.: "Battery test" software can measure the battery's runtime, but can't tell you why the runtime is short. i.e. whether it's a bad battery or a bad charging circuit.

4

How to check your laptop battery health in Windows 7 By: Arie Slob

Windows 7 includes a new command that shows you a lot of details on its power usage & settings and helps you troubleshoot power issues (like Windows 7 waking up unexpectedly when you've put it in Sleep mode).

This command also shows you some detailed information about your laptop's battery, including its design capacity and the last full charge. With this data you can calculate how much (percentage-wise) your battery has deteriorated over time. Let's have a look:

  1. Click Start button and type cmd in Search programs and files box
  2. Right click on cmd.exe listed at the top of the Start menu and click Run as administrator
  3. In the command prompt type cd %userprofile%/Desktop and press Enter
  4. Next type powercfg -energy in the command prompt and press Enter

    powercfg will enable a trace for 60 seconds. If you want to use it for more information than just the battery details, make sure no other processes are running during that time

powercfg -energy command prompt

When finished, powercfg will generate a report (in html format) which shows errors, warnings etc. Since we directed the command prompt to your desktop, the report will be placed on your desktop as energy-report.html. Just open the report in your web browser & scroll down to the Battery Information section.

powercfg -energy Battery Information

enter image description here

Above are two samples. On the left is a relatively new battery (a few months old). As you can see, the last full charge is only some 5.5% below the design capacity.

On the right is an old battery (around 4 years old) which shows that the last full charge was nearly 40% below the design capacity. From experience I know that this battery will only last a few months more. I've had a battery fail a few months after it tested 45% below its design capacity. I recently did a 'stress test' on this battery (which will show you the minimum time you can expect while running the laptop at 'full power'), and it only managed 36 minutes. Compare that with 125 minutes for the new battery.

source


Edit: The powercfg command is included in Windows 10
Link: http://www.howtogeek.com/217255/use-the-hidden-powercfg-tool-to-optimize-battery-life-on-windows/

  • 1
    The linked image doesn't work for me – George Aug 31 '15 at 14:05
  • @George - Works for me. – Ramhound Aug 31 '15 at 14:45
  • The question is tagged windows-10, and the OP specifically mentions Windows 10. Maybe this answer that is written for Windows 7 helps, but it would be better if you edit to at the very least make that explicit. – a CVn Aug 31 '15 at 14:54
  • @MichaelKjörling - updated with link to confirm. I can not edit a quote. – Divin3 Aug 31 '15 at 15:12
  • Step 3 can be skipped - you don't need to be in the user's Desktop folder to run powercfg, since it's a built-in Windows utility. Run it by typing start energy-report.html and pressing Enter – Canadian Luke Aug 31 '15 at 17:50

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