The reasons for this is the surge protector. Sometimes the laptops work by plugging it directly with the power adaptor. The indicator also says not charging even when the AC adaptor is connected. Well, many dell users have gone through this frustrating moment. Dell Laptop Battery Not Charging But Laptop Works With Power Adaptor Now, you can easily replace the individual cells inside it. We all share the same problem most often. Well, you are not the only one facing this problem. You might have also experienced that it was working correctly a year ago, but now its charging diminishes very quickly. If this test does not detect any issue, then there is most probably an issue with a lithium-ion cell. You can download and run the stand-alone battery test from your manufacturer’s page and then check if it detects an issue with your device. Hp Laptop Battery Not Charging When Plugged in