One of the biggest customer complaints about the iPhone 4S is battery life. The battery never manages to last even a whole day and sometimes not even a half of a day. Although the iPhone 4 has always managed to last nearly a whole day, it isn’t much better. Apple is working on an iOS 5 software fix that might eventually take care of the battery draining issues that face iPhone 4S customers. Their first attempt, the release of iOS 5.0.1, wasn’t much help for some users.
If you cannot wait any longer and you own either of these phones one solution could be the MiLi Power Pack 4 ($60) from xengadget.com. The 3000 mAh slider case will give your iPhone 4 or 4S the extra power boost it needs to last until bed time. I tested it on my iPhone 4S and I’d like to share my experience with you..