This Trident Case Electra EL-SAM-S4-BK charging case features a built-in battery to extend the life of your Samsung Galaxy S 4 cell phone. A silicone inner layer and tough polycarbonate shell help protect your device.
Pros: Charging feature nice, especially when running power hungry apps on phone. Solid and durable--has protected phone from some drops already. Cons: Hard plastic exterior is slippery--owned phone nine months--first seven with different case never dropped once--last two months with this case dropped a few times due to the hard plastic "slidy" exterior. Often too big to keep phone in pocket--and carrying around out of pocket naturally contributes to more drops. I recommend the case only if the charging feature is critical to you--otherwise, contrary to common sense (for cons mentioned above) you WILL be dropping your phone more often. Be sure to wear pants with large pockets or keep phone in bag when not using.