DX+ 2400 mAh iPhone 4/4S Battery Case

Three weeks after ordering this, I decided to test it to its maximum capacity as I wanted to drain the 4s battery and fully charge it as I do once per month. I had fully charged the uNu a week earlier and I had not used to fully recharge the 4s. I left home on the way to work with about 32% battery capacity on the telephone with a 90-minute commute ahead of me. I listened to music and downloaded a dictionary on the way there using 3G on the subway. I also conducted a couple web searches. On my return trip home (I leave my phone off at work), I began with ~18% battery power (these percentages are all according to the meter on the iPhone). I allowed the telephone to drain down to ~1% battery power before turning on the uNu to begin charging my telephone (it took about 30 minutes of reading an e-book, downloading a dictionary, and checking six email and three text messages to go from ~18% power to ~1% power using 3G with WiFi turned on). The telephone continued to charge throughout my trip while undergoing what I would consider to be moderate-to-heavy usage while on a typical subway commute (listening to music, and conducting a 3G download of two e-books on the way home at one stop with decent cellular coverage, all while reading another e-book - no talk, however). When I returned home, I began browsing the news using WiFi while still using the uNu to continue charging the battery. A little over two hours after I starting charging the telephone using the uNu, it stopped charging the 4s battery. My battery indicator read the telephone had reached a 78% charge. I cannot say whether all will get these results, but I think they are reasonable for commuters who use their telephones for entertainment while commuting. Also, I cannot say whether or not this is the best phone case for all as I have never dropped the phone using it and I have never broken a phone because I dropped it on the ground (water will be likely to get in if you drop it in a tub of it). For those primarily interested in battery life with a least some regard to telephone protection, this product delivers.