Some HP Pavilion standard 6 cells batteries apparently use the same ID of 12 cells batteries. This would lead GNOME to display the following notification at every login:

Battery may be broken
Your battery has a very low capacity 48% which means that it may be old or broken.

Of course M$ windows wouldn’t care a bit about your battery health status and thus not annoy you with any message.

Fortunately your battery is not broken but simply not carefully crafted. This is not a big deal though. You can get rid of the “battery may be broken” message by typing

ALT+F2

gconf-editor

navigate to

/apps/gnome-power-manager/notify/low_capacity

and untick the value.

At the following login you would see that message no more.