hi guys,jus been out with my new system(second hand) and the battery died after only 2hrs use, i took it off charge when the full indicator came on so i cant understand it running out that quick, although it only took a few hours to charge and the bloke i got it from said its hardly been used from new and had been stood for a while! does it need an overnight charge or am i looking at buying a new one if so can i uprate to something better?. its a haze golf buggy battery deep cycle absorbed glass mat thingy. cheers.