Why does my laptop stop charging at 79?

When my laptop charges, it only reach to 79%. How to fix it? My type of laptop is ASUS VivoBook 14.

Hello Aurelius. This is Wil an independent advisor. I would love to help you with your concern about your laptop battery. I had the same problem. my laptop was charging only till 79% and then stop charging. After 79% it showed => (plugged in, not charging).
Now follow the steps to know how I resolved my issue:

1)click on the start menu

2)If you are using an ASUS laptop, there is a preinstalled software named ASUS BATTERY HEALTH CHARGING. Search on the start menu (ASUS BATTERY HEALTH CHARGING).

3)Now open it.

4)It shows three modes: a)Full Capacity Mode, b) balance mode, c)maximum lifespan mode.

5)You can read all the details about it there.

6)According to your question, you may be using BALANCE MODE that maintains your battery level only up-to 80%

7)If you want to charge your laptop up-to 100% then select FULL CAPACITY MODE.

I hope my suggestions help you. If you need further assistance please do reply back and I will respond as quickly as possible. Have a nice day.

Thanks,

Wilfred P.

Independent Advisor

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.