Nokia 5300 Battery Help??

I have a nokia 5300 i was wondering if there is a bettery that i can buy with more life to to it. Like if there is an upgrade battery for it. The standard one just isnt enough.

thanks

I got one from eastmaze.com for about ten bucks. You can buy it bundled with a desktop charger and just carry the spare battery with you for a backup. It's supposedly a 1000mAh battery so it should last a little longer than the standard 760mAh