can't help with that specific question. I use cheap, but easy to use, computers. the wheel factor is lost every time I reset them for each ride. since I use 2 or more bikes with 3 dif sets of tires depending on season, maybe this strategy will help you. I write down the wheel factors where I won't lose them. basically a giant zip lock freezer bag w/ computers, batteries & manuals. I let it breath (from time to time) tho cuz I think batteries need to breath. I keep that bag with my bike stuff. at 1st I was annoyed that I had to reset the wheel factor after each ride but I got used to it. so changing a battery is no worse, for me