I am using a HP Probook 4510s and the battery started having problem, Windows 7 showed an alert advising to replace the battery. I bought a new battery which is working well but the battery indicator never changes from when I am on battery or on AC power. I have googled about it and I got a suggestion made top someone else:
I suggest you to follows below steps: First open the Device Manager and then you will need to expand Batteries. Then next step is to click over Uninstall Microsoft ACPI-Compliant Control Method Battery which by doing right click over it Finally steps is to restart your system.
It didnt work for me as the battery meter disappeared. I have also tried disabling other devices found under the battery list of the Device manager, but to no avail.