No estimated battery time since system refresh.

I had to do a system refresh a while ago, and now when I hover the mouse over the battery icon on the taskbar (or click on it), It doesn't show the remaining time.
I'm using an Acer Asprie E1-510p-2810.

Did you reinstall the Acer software for the power settings/ACPI?

No, I did not. How do you do that?
Edit: The est. battery time is now back! For 5+ boots ever since my reset, It wasn't there. But I just started up my computer replied on this thread, then I noticed It was back.

Would you still recommend that I re-install it?

You have to go to acer's support site, look up your computer model and then go to downloads and look for the acpi download. Computer 101. Simple stuff.