Confused:

First time laptop owner. Battery icon said 'plugged in not charging '. There are 4 lights around tbe edge of tbe kbd three are green (or blue) and one is red. The unit is approx 1.5 years old so I think its time to order a new batt, which I do.

Battery arrives today and while looking at the video on how to change it I look at the battery icon and it now says fully changed 100% , There are 3 green (or blue) lights around the kbd. Apparentley the red one has died.

What am I supposed to do?