So, just how long should a battery that requires no maintenance and is kept on a tender last. On my Ultra (minimal active accesories) it seems 2years with or without a tender. The last one isn't even 2 years old and has been on a tender when the bike is stored. the electrical system is in proper working order and the tender is operating as designed. So what gives. This last battery came from the H-D shop and cost $148.00 and left me 20 miles from home. Can I get a new lead/acid type battery anymore? I haven't found one out there.