I need a new battery - is it worth spending £££ on a AGM/Gel one or will a sealed lead acid be OK? I can't use a standard one as the bike is used for offroading and I don't want the acid leaking out if it's on its side.

Hi guys. New member Steve here. I used to have a 1996 Black Funduro, which I kept for about 4 years and sold it about 5 years ago when I no longer needed it for commuting in London. I now need a commuter / tourer again and have bought a... Black Funduro again (1998 this time, off this very...