The battery meter has to be adjusted to keep it accurate.
No, it will not hurt anything if you ignore it. But don’t you want to know how much life is in your battery? Here is the general method.
First, charge the battery fully and then a little more. That way you know it is at 100 per cent full.Next, make a note of the time. Unplug the charger and use your laptop and use it the way you normally do. Do not turn it odd. Just continue to run it on battery until it shuts down by itself. Note how long it took.
With this information you can now calibrate the charge meter of your laptop. Look in your user guide to see how to doit.
For Apple iPad click here. Apple Battery Adjust.
For HP subnotebook here. HP Battery Meter Fix.
For Dell use this link. Dell notebook Battery calibrate.
Also, there are some video son You Tube about battery calibration. Take a look at some of the videos and learn how.
You can skip the ads and look for a video that best describes your mobile device. It is not hard. Take a look.