My 4iiii power meter has started playing up - dips in power down to 15-20% every 3 minutes or so.
Battery is fine, humidity fine, temperature fine.
Is it on its way out? Had it about 4 years so had 1000+ hours of use
Nah, you just need a new bike
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Get in touch with 4iiii customer service. I’ve sent stuff back to them and they’ve been great. First they’ll probably send you the pdf of troubleshooting stuff like making sure the contacts aren’t bent and doing a battery flip while also possibly replacing the battery. After that if the problem persists they’ll probably send you an RMA and a packing label to send it back. They’ve been extremely no hassle in my past interactions.
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Have you tried calibrating it? I had my 4iii readings go a bit Skewey after a crash. Did calibration and it was back to normal.
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Could also be a connection problem. Make sure nothing else is trying to connect to it, or the device you use for receiving the data.
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My 4iii used to go often like that and it would be a sign to gently lift the battery contact. Be cautious though, I ended up with a detached contact. Bizarrely, since I stuck it back on with a tiny piece of electrical tape its been relatively stable.
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