bike started fine a few days ago first time in months. has been on constant trickle/maintenance charge in the garage tried again today and nothing. battery was showing as fully charged on the ctek but dash tells me voltage is 13.3v. try the button and starter spins but no fire. dash is now saying 12.3v the battery is at least 3 years old if not older but has been on the ctek when not in use for at least the time i have had the bike which is about 2 years i do have another donor bike (another 749) that has yuasa lead acid so this weekend i will do a swap and see the garage has been cold and i understand the lithium batteries may have weaker CCA than lead acid equivalents. it is odd though how it started on the button a few days ago and nothing now
I would try bringing it indoors for a few days to slowly warm up , then put it on a suitable charger ( again indoors ) ..... but just a thought ......
12.3V on the starter is fine, lithium chemistry batteries don't perform from cold. Switch the lights on for 30 seconds and crank over again. Andy
Lithium batteries generally have a higher CCA than classic batteries. This is the main reason I prefer them (not so concerned about the weight gain for road use…). As @Android853sp said above, when cold, they need to be « woken up » with a draw. 30-60 seconds with lights should do the trick.
Well that was weird Bike started fine after overnight rest Then it struggled to warm start and needed some choke action It's been stood still for months and not ridden in that time so i reckon it could be a combination of low temperature and fuel thats past it's best Needs a good thrashing to see what's what
You should not really need to trickle charge a lithium battery. I guess you can trickle charge if you have a parasitic draw from an alarm or similar, but the most you should ever need to do even if it goes flat is stick it on a (suitable) charge for a few minutes and then start the bike.
The battery maintainer for a lithium chemistry battery does not have a desulphiding programme. The charger must also not exceed 14.9 volts and it must also recognise not to let the battery go below 11.2 volts. Modern lithium batteries have onboard electronics to prevent inadvertent over and under voltage though. Andy
This link to previous discussions of Lithium batteries on the forum may be of interest. https://www.ducatiforum.co.uk/threads/dead-desertx-battery.96440/ . Hope it helps. Tom.
