You know I've noticed about a week out the battery on the 535 seems to being getting tired. So a part of the normal maintanance I now take the time to give a little charge and that seems to keep it happy for the next week or more. Question is am I making things worse? I do know this is not how it supposed to be, but it's really not a huge problem for me. Gives me a chance to clean all the dirt from under the seat anyway.