Battery is shot, whats reccomended?

[crackedvenom]

I charge my battery until it says 100%, i take it off and a few minutes later im already down a couple percentages, usually doing nothing. What do you recommend? im looking to double my battery life. Right now, im getting 3 hours, usually just browsing the net and its not for very long, just to check facebook and what not, then i exit. Its pretty bad when it doesnt even get me through work.