Flat battery from OEM alarm

[Flyingscotsman]

It might be the Optimate. I think that it works by going through cycles of slight discharging & trickle charging. When it's going though discharge cycle the battery voltage may temporarily drop below the alert level.

I have a tracker & alarm but no optimate. If bike is left for two weeks I do get a low battery alert, but bike always starts fine.

 

[IMORTAL_Indian]

I had an issue with my battery just recently.... 2016 / Factory fitted alarm......and 1 year in eggy smell... daily usage....

Called BMW Assistance and was swapped under warranty same day....

https://s1000rrforum.co.uk/showthre...ll-under-seat-cowl&highlight=Battery+Warranty

 

[Julestys]

I have dropped tracker alert to below 11 volts, and wouldn't think optimate would go below that.
also left the bike without optimate and still have same thing, get a warning and then I look an hour later and its on 12.5 volts
very strange

It might be the Optimate. I think that it works by going through cycles of slight discharging & trickle charging. When it's going though discharge cycle the battery voltage may temporarily drop below the alert level.

I have a tracker & alarm but no optimate. If bike is left for two weeks I do get a low battery alert, but bike always starts fine.

 

[Flyingscotsman]

I have dropped tracker alert to below 11 volts, and wouldn't think optimate would go below that.
also left the bike without optimate and still have same thing, get a warning and then I look an hour later and its on 12.5 volts
very strange

That's weird. Sounds like a faulty tracker.

 

[alex]

My previous tracker drew a lot of power, but the bike was in a location where it couldn't get a signal...

 

[Julestys]

Looks like my issue is with the tracker unit being faulty. getting warnings that battery was low then checked back an hour later and was back to 12.5v
New unit being fitted under warranty, hopefully solving the issue.
Personally would have thought tracker company would come to me rather than having me taking the bike back to the dealer for the day