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How often should I do a laptop battery gauge reset?

Infact, it will not increase lifespan. It won’t do anything for the battery at all except waste a charge cycle. The only remotely useful thing that this gauge reset will do is reset the gauge. The only time you need to reset this gauge is when your battery habits have changed drastically, and you need the gauge to be more accurate.

If you’ve been creating simple documents on a dim screen for several months, the “gauge” will learn that this low power usage gives the battery the patient opportunity to drain fully and efficiently. If you suddenly start playing videogames, the battery may appear to suddenly drop faster when it gets low because the gauge doesn’t know how the battery will react, and that the battery can’t keep up with this new unusually high demand. Resetting the gauge will teach it the battery’s current capabilities so it can predict how much it will suffer from the high-powered gaming usage.

Since all of these factors accumulate over time and the gauge will eventually learn them, it doesn’t make sense to do this unless you’ve suddenly changed what the computer is used for.

Why is my laptop battery not charging 100%? How do I overcome this problem?

You must be experiencing a kind of “97% remaining and not charging”.

This is a special feature in modern laptops to protect the battery from overcharging and hence increase the life of the battery.

In most of the laptops, the Charging light on the laptop turns GREEN from RED when the battery is charged 95%. When this GREEN light comes, just shut down and keep the laptop connected to the charger. Wait for a couple of minutes and then switch it ON again.

You can verify, now it will surely show 100% remaining

This works because it is the system software that stops charging the battery. Once it shuts down, there is no software to monitor such things and hence the battery gets charged to FULL.