I just got a replacement battery for my Acer Aspire (5742 series) laptop. When the battery is fully charged then the laptop automatically switches to battery only - dropping the AC. If I unplug the AC & plug it back in it briefly stays on AC & then goes back to battery.
The laptop works fine on AC with other batteries. Is there anything I can do to try to fix this or is it just a matter of returning it?
OS is Windows 7 Home Premium 64-bit SP1