[QUOTE="Hog"] [QUOTE="wessie"] [QUOTE] Nige wrote: Jeremy wrote: Not been used for 10 days. Plugged in the optimate today and none of the lights on it, er, lit. Strange I thought. Popped the key in the ignition. Nothing. No bleep, no lights, er, lit. The famed BMW reliability... anyone any [1] suggestions? [1] angle grinder, shit in the carbs and gixxer thou' not permitted Totally fucked battery & i reckon you must have left parking light on. Odd The Odyssey battery in my RS seems to have died. I have it on the Optimate but I'm not hopeful. Which is a cunt. Expensive and meant to last forever. It did 6 months in the IoM airport carpark without complaining. [/QUOTE] if the odyssey is totally flat then an Optimate[1] won't recover it as the power output is too low to overcome the initial internal resisitance. If you look here [URL]http://www.odysseybattery.com/chargers.html[/URL] you will see the minimum output is 6A This is one of the recommended chargers for AGM batteries [URL]http://www.mdsbattery.co.uk/shop/productprofile.asp?ProductGroupID=2655[/URL] an alternative CTEK here [URL]http://www.tayna.co.uk/ODYSSEY-PC680-P3107.html[/URL] FWIW, I've never used anything other than a mk1 Optimate, but I've never let the battery go totally flat: one top up after the usual 3 month lay off to replace what the LCD clock has used and away it goes. Been the same for 5 winters now. [1] although the latest mk4 version claims to work with all 12V batteries inc AGM. possibly so as it claims 33% more output. I'd still get the CTEK if you are going to go the deep discharge route.[/QUOTE] A cheers, Bee wants her Opti back anyway[/QUOTE] Try "jumping" the dead battery with another while the dead one is attached to the Optimate. It can fool the Optimate into thinking it's got something to work with and when the "jumper" is removed, the Optimate keeps on charging.