The giant ZeroLemon battery now has that type of case available: http://www.amazon.com/Warranty-Zerolemon-Series-Samsung-Galaxy/dp/B00GJ0WFY4/ref=sr_1_9?ie=UTF8&qid=1400555899&sr=8-9&keywords=zero+lemon+galaxy+s3
It clips in quite nicely, however it also doubles the size of your phone. The battery easily lasts for 3+ days of heavy use though.