The ShockDrop Case for that iPhone 5 offers more ruggedization than any other rubber + poly-carbonate case. We have 6mm of impact absorbing silicon at the corners, a semi-rigid (replaceable) screen protector, and tear proof flaps. Your body slims down to 3mm of protection to permit an fit into your bag or enterprise iPhone Charging Carts.
6mm of silicon shock absorbing four-corner protection, slimming to 3mm of overall body shock protection
Molded-in Volume Down and up Indications
Rip Proof Port Covers. Thick so that they stick, fit, and don't rip
Semi-Rigid Screen Protector to take a beating
No-Slip Grip texture
Any more details about iphone extended battery, pls check TabletPCPhones.