Does the rotor give any signs that the batteries are runing down - have replaced them twice so far this season, but only because it felt like they'd been in forever, not because they had actually run out!
When it stops, change them.. I havnt changed mine since the beginning of the season.. New year new batteries, and its still going strong!... 2 tournies a month roughly...
i brought some of those lithium's from a well known battery maker and i haven't changed mine since i've had the rotor. i think thats nearly 2 years with training and tournies every month. so playing at least 3 times a month.
i forgot what it was like to have a hopper die on your gun, i might buy a halo so i can bring back the good old days.