A few weeks ago, I bought a brand new laptop battery. After my first charge, the battery indicator on my machine went to 100%. I have charged it 7 times. Sometimes partial, other times when the batter is low. If the battery is low, I would start it from 25% and it would go as far as 96%. I have charged it at 7% and have left it overnight with it not going as higher than 94% at the most, the last time I remember.
Now after a number of discharge cycles, my battery reading will not progress higher than 86% even leaving the laptop over night still charging. It seems though, the more I leave the laptop on charging, the figure keeps going down and will not go higher or even back to 100%
Can anyone explain why this happens and what I should do to rectify this problem.