Windows 10: I charge the laptop and when the battery is 79 percent the automatic charging stops. I...

I charge the laptop and when the battery is 79 percent the automatic charging stops. I can't charge the laptop until the battery is 100 so what is the problem ?

:)

 

Laptop charges to 79% and stops charging

I've noticed that my battery has stopped charging at 79%. I generated a battery report for my laptop, but the report kept saying the maximum battery life is 79%. Later, I uninstalled the Microsft AC Adapter and Microsoft ACPI Complaint Control Method Battery to see if that will help. It did, but then the battery icon disappeared, and I could not find where to enable it. Luckily, it was automatically installed back into Device Manager. My charging light is white if it is a full battery, and red when it is 99% and lower. On startup, it shows white, but for the short seconds where I type in my PIN, it turns red, and after I unlock the laptop, it turns white again. My laptop is an ASUS VivoBook 15 X512JA

Please help me... I really want to fix this problem.

 

Why is my laptop battery charge topping at 79%?

This pertains to a 2 1/2 year old HP laptop.

I run it plugged in most of the time, but once a week I'll start the day unplugging it, and leaving it unplugged until it gets down below 10%, which usually takes about 5-6 hours.

Late last week, I got a Windows notification I'd never seen before, which I now can't quote verbatim, but it suggested using "battery optimizer" - I think that's what it was called - to "optimize" my battery. Hey, why not?

Except that

1. The next time I ran the computer unplugged, the battery drained to my needing to plug it in, in about four hours. Much faster than usual.
2. Then today I noticed that my battery was only 79% charged, though plugged in.

Below is a shot of my battery graphic:





Having been plugged in more than a day ago, it should be at, and holding at, 100%.

So how do I get the battery back to 100% charged? Is doing so advisable or not? What's a true "optimum" setting for the battery?

In asking the "optimum" question, I've never had a performance problem/issue with the computer; my main goal is that, when it is running on battery, it runs for as long as possible.

 

Toshiba Laptop Not Holding Battery Charge

attached is a pic of the internal of the laptop
there does NOT appear to be a CMOS battery

what should my next steps be?

- fully charge existing battery and see if i remove it and install back teh next day whether its still fully charged?

- charge the battery for 18 hours to charge the internal CMOS battery?

- suggestions please as Im not sure