Acer Aspire Utrabook S7
Intel i5 dual core
Battery life of the original battery (which is not user-replaceable) was very short so I had it professionally replaced last summer. Worked fine for a year. Now it will not work at all if unplugged.
Battery Icon says 74% available (plugged in) and it never changes.
If you replace your laptop battery make sure that it is original because in market there is many copy products thats look like original but it is not , that also slow your system processor.
If you have any futher problem than, i suggest you to go service center.