About a month or so ago, I pumped my tires on one of my bikes and started my ride. I zeroed out my cyclometer and proceeded. After about 10 miles I saw that the batteries had died. After finishing my 42 mile ride, I realized that riding without constantly checking my cadence and speed was more relaxing and enjoyable. I still haven't replaced the batteries on that bike. When I lead rides for my club I use a different bike with a working cyclometer because I need to regulate the groups advertised speed. At least twice a week I ride the dead battery bike and it's almost therapeutic.