Yes, it hasn't happened to me but you do get the occasional dud. And when they do fail it is usually very sudden and unexpectedly.Without going into too many details, this is my line of work. You are managing your bikes well with your routine but it's not uncommon for even new batteries to fail before their time if neglected by either lack of use, maintenance or short stop start use over a period of time. Not all batteries are the same. There can be nothing worse than getting kitted up to go out for a blast and the bike won't start.