My partner has a hewlitt Packard 6730b laptop.

And for some reason the battery isn't charging properly its been plugged in and left to charge over two nights and it didn't charge. The following day my partner turned it on and it charged during the day the it just gave up. I got a new battery sent out to me yesterday thinking the other battery was stuffed but turns out the same issue is happening with the new battery its driving her mad have checked the settings and properties and according to the computer it says the device is working properly.

Please can somebody shed some light as to what might be wrong with it. I'm running windows 10 same thing happened with windows 7