IPhones are amazing - they are simple to use, work nicely, and look great. It is not a surprise that you find people everywhere immersed in their iPhone. With this much use, mishaps occur - the most common is that your phone drops normally resulting in a cracked display.
If the display of your phone is decoded, or your current battery never normally charges, or maybe your iPhone got wet in the rain, you are not by yourself. A lot of iPhone owners have battery problems because they use their useful phone so much or have damaged their phone.