The Zolo is an ingenious smartphone accessory that includes a case, charging cable and battery backup, all for only $20.
The Zolo package consists of three components that are interconnected via magnets. The first component is the protective case, which is claimed to meet military-grade standards for durability and impact protection. The second piece is the cable, which stays fastened to the case and the battery using magnets. Finally, there's the battery.
The Zolo even comes with tiny magnetic clips that can fasten to the end of third-party cables; this makes it possible to charge iPhones and other devices that don't charge via microUSB.
The advantage of having the case and battery connected via magnets is that the battery can be connected and charging without having to hang awkwardly.