I recently received several Q-Power sample items to test and review. I am in no way affiliated with the company, and the following will be an unbiased review of the strengths, weakness, and capabilities of several of their products. Q-Power iPhone Rechargeable Case (FC5) Quick Overview Built - In USB Cable Changeable battery Apple iPhone protective case Input Voltage: DC 5V Output Voltage: DC 5V Output Current: 700mA Battery Voltage/Capacity: 3.7V/ 1900mAh Review This product is very similar to competitor products such as the Incase Power Slider, or the Mophie Juice Pack. This is a protective case which provides 1900mAh external battery to keep your iPhone going beyond its built in capabilities. My initial impressions of the device were positive. It was nice looking with a shiny black finish similar to the iPhone itself. It has switches on the bottom of the device allowing you to select to charge using the battery or sync using the built in cable. I like the fact that it has a cable built into the case allowing you to charge the battery or sync data without having to carry any extra items with you. It is able to fully charge the iPhone almost 2 times. While charging I noticed no excessive heat up. Overall the shape and feel of the case with the iPhone in it is solid and comfortable, albeit a bit heavy which is to be expected. Upon using the device, I have noticed a few design oddities. For one, the silence switch is completely covered by the case making it inaccessible and useless. Another issue I have with this case is that the iPhone’s face sits above the rest of the case making it very vulnerable to scratches or damage if dropped. It also makes it unfit for laying the iPhone face down on the table. A slight annoyance users might find with this device is that you have to take the back off and remove the battery to access the built in cable to sync the iPhone and charge the cases battery. This is a disappointing oversight in the engineering of this device. There is also no iPhone cable port so users will be unable to take advantage of any accessories they may have. Overall this is a decent device that has some benefits and some shortfalls. It is priced considerably less than the competitors, and its design, features, and capabilities reflect that.