extended battery + charging case g s3 question

[tbmxbrando]

I wondered if I could get an extended battery, then get a case that would fit over the extended battery that was a charging case. Or if I could stretch or modify a charging case made for reg batteries. Any answers would be great. I want my phone to last days.

 

[andrewlo]

I have bought this dock station. I think it is quite good. There are charger case, too. To me, I don't like this kind of plain case so I would prefer the dock station.

Samsung Galaxy S3 i9300 Dock Station | DSstyles

Samsung Galaxy S3 i9300 Battery Cases - Black | DSstyles