Schwinn Airdyne Classic Display Battery Cap replacement, button battery cap. These are 3D printed, plastic battery caps. I designed and printed these myself, so you can observe that the finishing is not "factory like", however, the parts are very strong, compared to the original caps, which break easily. They fit these displays nicely. I have hand-finished and tested the fit of each batty cap. There are 2 battery caps in a purchase in case you have an issue. This replacement part is not from or affiliated with the Schwinn Company or Nautilus, Inc.