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PostPosted: Sun Jul 20, 2014 8:25 pm 
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Joined: Fri Dec 23, 2011 10:43 pm
Posts: 3
I just replaced both batteries in my sram s975 SRM, and everything seemed to go smoothly. The zero offset was right around where it had been before the thing ran low on battery, so it seemed alright. I took it out today, and 95% of the time, everything matched the numbers I was getting with my other SRM. But every once-in-a-while, the power numbers would about double for a bit (5-6 seconds), and then go below what I knew I was doing, and finally settle back around where I expected it. When this happened, I would go re-zero it, and the ZO was almost exactly what it had been before. Normally, I would blame this on the garmin trying to auto-zero it when it shouldn't, but that never happened nearly this often. On longer stretches of around constant power, this happened a lot less often, it seemed more frequent with stop-and-go.
I'm wondering if anyone's seen something like this after replacing batteries?

EDIT: Here's a screencap of what happens. The cadence data is fine, but the power spikes up for around 2 seconds, and then down to 0 for one, and then back to normal.
Image


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