Juice Pack Pro-like case?

[LMychajluk]

Does anyone know of a case for the S3 that may be similar to the Juice Pack Pro for the iPhone?
mophie juice pack? PRO - Rugged travel battery case for iPhone 4 & 4S

Though the built-in extended battery would be nice, I'm not stuck on it. Just need a ruggedized case that's dust & splashproof for use mostly on the boat. Right now, the Otterbox Defender seems to be the closest to what I'm looking for, but even that is not completely sealed.

 

[BcSirstaroth]

YES! I am looking for a backup battery/case combo. I hope they make a case similar to the juice pack for the S3.

 

[xKrNMBoYx]

There are cheap extended battery cases like mophie juice pack but they are on ebay and I'm not sure on reliability.

The only other one similar is by PowerSkin but it won't protect the phone as the case you linked to.

PowerSkin for Samsung Galaxy S III (Pre-Order)