Windows 10: PC automatically shuts down before 10%. Battery Capacity Test Shows Battery Capacity Reduction

I recently purchased a new Li-ion battery for my HP Probook 4520s PC which claims to be **5200mAh/58Wh**. When I ran battery scan with windows powershell, I saw that the capacity was **45Wh**. I was directed by the user manual to use the battery till **2%** then fully charge the battery to **100%** The battery was at **72%** when I bought it new. But the battery shuts down at **38%** From the **72%**. I fully charged the battery and then try to use it to **2%**, but It always shuts down before **10%**.I ran the battery scan now on powershell and discovered that the battery capacity has red

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Windows 10 battery report - Full charge capacity exceeds design capacity

I've replaced the battery twice on a Sony Vaio SVS15 with an aftermarket brand and have run into an odd result in Windows 10 battery report.

This shows up and slowly increases(full charge capacity) after following each of the battery manufacturer's recommendation to discharge the battery completely to allow software estimates' re calibration. On initial install, the capacities match.

With the first aftermarket battery:

After fully charging to 100%, then unplugging the charger, the battery will reflect 96% within about a minute. It then seems to discharge much faster than the estimates given by Windows. At the 10% mark, the system shuts down unexpectedly, completely drained.

Second aftermarket battery:

Intermittently, it shows 96% and not charging - I can unplug the charger and back in to bring it to 100%. Upon reaching 10% remaining (10 minutes remaining estimate), it'll run for another couple minutes, then lose power.

Are there other ways to re-calibrate a system to properly report battery life, or could these simply be two faulty batteries?

 

Battery FULL CHARGE CAPACITY Reset

Yves,

"Full charge capacity" means the capacity that the battery is managing to achieve. It is not a limit set by Windows or anything else; it is merely a reading of what the battery can actually do. You can use the comparison of Full charge capacity with Design
capacity to decide when to buy a replacement battery [I do the same regularly].

Full charge capacity will always decrease over time as the battery wears out. This is a chemical phenomenon not a Windows-imposed characteristic.

Windows display of "Fully charged [100%]" means - the battery is currently at 100% of what it is able to achieve. In other words, "Fully charged [100%]" is relative to Full charge capacity.

Sometimes, you can find that cycling through the battery three times** can improve the Full charge capacity a bit.
On at least one of my batteries, the maker recommends doing this every three months. But doing so is using up even more of its remaining life so you can complete this procedure only to find that you are worse off afterwards.

** In other words, loop through this three times -

• remove the AC power
• use up the whole charge by using the computer
• recharge fully

Denis

 

battery capacity?

hii

I bought a lenovo ideapad510 laptop yesterday , I looked at the battery report and saw these numbers

Design Capacity
39000

Last Full Charge
38805

today , I looked again and saw this

Design Capacity
39000

Last Full Charge
36910

at the first day the battery worked as 99.5% , so i didn't pay attention and said it looks normal , but now the battery decreased to works as 94.5%

so my question is this decreasing normal especially in such short time " 20 hours " ?!!

thanks in advance

dina

* Moved from Community Participation Center

* Original title: battery