My 2015 RT has about 40k miles and is ridden nearly everyday. I've recently noticed that if the bike is not ridden for more than two/three days consecutively, it is hard to start. Sometimes to the point that the battery seems to become so weak that it seems as if it's going to give out all together. I began putting it on the Battery Tender when I know I won't be riding for a couple of days but most often, that doesn't seem to make any difference. I've given in to the idea that I simply need to replace the battery but, I'm wondering if I should be surprised by this? This is my third BMW but my first RT. Are the RT's harder on batteries for some reason? Or, is a couple of years all that I should come to expect from the life of a modern battery? Both before and after I began using the Battery Tender, the voltage indicated around 9 but very quickly climbs to 14 once the bike fires up. I commute daily for right at 30 minutes/15 miles one-way and the garage remains at a consistent 72-75 degrees.
Last edited: