Battery Tech, Garmin G5 EFI, FAA Face Slap
I read with interest Jim Cavanaughs article on battery upkeep and battery minders in the September 2016 issue of Aviation Consumer. I am a big believer and have had great results (including eight years of reliable service) from two Concorde gel mat batteries set up in series in a 24-volt Beechcraft Sierra. My question to you relates to testing. I had been told that using a 12-volt load tester on each battery is the approved method to test for battery condition.