don't go to that big store (best buy, circuit city, radio shack) they charge $35 for your batt if you don't have an ebay account go this site
www.eforcity.com they located in arcadia california i think your batt is only $14 to them. it's up yo you if you want oem or generic but both of this work well. i always buy my accesories to them just check it out.