battery!!

Hello iv just brought a rsv factory 2005 and i need a new battery does anyone now the part number of the uprated battery or where i can get one from as i look on ebay amd dont tell you anythink about the battery

just as i decide to swap it the bike wont start. ive left the battery on charge overnight, still no joy. its not turning over at all. i have an uprated starter solenoid on it. sometimes i turn the ignition on and get nothing, other times i turn the ignition on and it all looks normal until i...