battery tender
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From: In a parallel universe. Currently own 2014 Stingray Coupe.
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Also, you may want to consider that your tender is not working properly. Do you have a friend that has a tender that you could borrow to test if it does the same thing?
Pro
Joined: Jun 2008
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From: Golden Colorado
2023 C8 of the Year Finalist - Unmodified
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Sometimes mine does the same. Sometimes it goes to the last light and sometimes to the second to the last light. No worries
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Joined: Sep 2007
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From: NE South Carolina
Made a simple device I plug into the Frunk 12 volt receptacle to check. I made it from an old Car Vacuum that didn't work. Cut off the VAC and installed a two prong plug. Connect my digital VOM to the plug. After ~12 hours, with car not started to drain any surface change read the voltage and keep the data. When it drops below ~12.8 getting time to think about a new one when conversant for me to change and when I see a sales etc. The exact value is not as important as watching for a change so need to check periodically.
