I installed a set of those cheapy heated grips and sure enough left them on overnight. Next morning flat battery so off to work in the car instead. Before leaving I chucked the trickle charge on the battery to charge it. Yesterday morning I try and go for a ride only to find the battery is still flat (yes the grips are off) and notice the trickle charge only has the ON light on not the charging light. I play around with the connection thinking perhaps I didn't push it in hard enough or something but still no charging light coming on just the ON light. Bugger it I'll push start it and get it going that way, right, wrong. I do manage to push start it but it spluttered, backfired and ran like an absolute dog as I rode it around the block and as soon as I stopped, the engine quit. No problems I'll jump start it so hook the leads up (leaving the car engine off) and get the bike turning over but still it wont start. Frustrated I give up and hook the trickle charger back on and this time I see the charge light come on. Left it on all day and last night bingo she starts effortlessly like she's always done. Now the question I have is why didn't the trickle charger work the first time, could it be they wont or my one wont charge a completely dead battery and why once I push started her did she run so bad. I have heard heaps of stories about people push starting bikes with flat batteries with no problems. I'm now worried if I stuff up again and next time I'm not at home the bike will be almost impossible to start. I'm going to give the heated grips the flick and when I upgrade I'll have a proper pair installed professionally.