mikeschumann Posted September 5, 2022 Report Share Posted September 5, 2022 A couple of weeks ago, I noticed that the front battery in my Phoenix (an Odyssey PC-625 AGM battery) seemed to be failing. The Dynon display showed voltage of ~9.5 V. When I selected the back battery only, everything looked fine. Note: Both batteries were the original batteries delivered with my Phoenix ~ 6 years ago. I assumed that the battery just needed to be charged, because I haven't been flying much this summer. I put a charger on the battery. The battery didn't seem to want to hold a charge, so I came to the conclusion that the battery needed to be replaced. I was somewhat surprised by this, as the Odyssey batteries have a great reputation and according to everything I read should last 8-10 years. I also would have expected the generic rear battery to fail before the Odyssey. While removing the battery, I discovered that the bolt connecting the ground cable to the battery was completely loose. I tightened the bolt, reconnected the charger, and everything worked fine. Another strange electrical story related to grounding issues. Quote Link to comment Share on other sites More sharing options...
Foley Posted September 6, 2022 Report Share Posted September 6, 2022 So bizarre how things happen. Quote Link to comment Share on other sites More sharing options...
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