I highly recommend this product in terms of battery power versus the competition. For the size and price, this is the best extra battery on the market. However, the cable/cord and adapter provided with the product are substandard. The adapter piece does not fit in the phone port tightly, so it slips out when joggled. This makes it inconvenient to carry in one's purse or pocket while charging. It forces you to charge the phone out on a table or desk, which defeats the purpose of having a mobile battery. Eventually, the cable/cord I received with mine stopped working entirely. The company suggested I use my original iPhone cable. I needed that one for home AC charging, so I purchased a new iPhone cord from Apple to carry with the phone and battery pack. The Apple version is high quality and long lasting, but expensive and not as convenient to carry because it is not retractable. This would be a perfect product if a higher quality retractable cord and adapter piece came with it! I also would recommend that New-Trent consider offering this unit, along with the retractable cord and adapter piece, in different colors. They used to have it in white - now it appears to come in black only. With all the cool cases and colors people put on their iPhones and iPads now, the battery packs should be available to match.