Help Charge going down quickly

[vishnu000999]

I had purchased Galaxy 5 mobile phone recently. It takes very long to charge it to 100%. Also, charge comes down very quickly, by around 8 hours when kept UNUSED!! I cant understand what's happening. How to solve this. I am new to samsung as well as android!

 

[cristi]

read this it will help An Exhaustive Guide to Saving Your Smartphone's Battery