Digital and Electronic Device Design Parallel Portable battery case by Appcessory Pte Ltd Like the iPhone 5, Parallel is set to woo the consumers with a super battery bank of 2,500mAh – that’s a whooping 1.7X more lifespan. This is extremely convenient for consumers who are always on the go and making full use of iPhone's capability. Parallel is a detachable battery with a complementary tough polycarbonate case. Snap on when more power is required. Remove to lighten the weight. It is ergonomically designed to fit well in your hands. With a built-in lightning cable and 5 colors matching protective case, it shares the same length as iPhone 5.