Oxford expensive but lasrt for years and you DO wire them direct to battery as have a low voltage cut out on them so great grips easy to wire and last a long time but expensiveothers tat spring to mind biketekR&GKeis and i think all three have the low voltage cut out so if you leave on then once battery drops to below 12.3 they cut off thus saving battery
no if you get oxford ones and wire them up to ignition it fks them up lol, the battery will never drop below a point that you cant start bike etc 2 wires to battery simples
They also come in a variety of types now - they do sport ones which are much thinner than normal and don't really feel like chunky heated grips to be honest, or touring ones, which are slightly thicker and have gel bits for added comfort!
+1 for Datatool, no need to remove hand from bars to adjust heat when on the move, won't flatten battery as automatic cut out built in and comes with a two year guarantee.