The first cap I had, like so many others peoples, fell off. For $30 I was able to replace the $1 part and continue using the power meter. After a few more months, the power meter stopped working. After some investigation I found that the cap to battery circuitry was not working. I reached out to 4iiii and was told I'd need to send in the entire crank to them. Not wanting to be without my bike for weeks, I messed around with the cap again. It still didn't work. I reached out numerous times again to 4iiii support and they would not respond. Was their lack of response due to the fact that my warranty expires in a few days? I finally spent another $30 and again, replaced the $1 cap. The power meter is working again, but for how long? I guarantee I will make sure that all 200 kids I help coach in MTB and everyone I ride with on my team and other events, will know to avoid 4iiii. It's too bad, because when it's working, it is a great set-up.
