Like the Powder Springs 2015 Honda Pilot owner who couldn't start his Pilot, mine wouldn't even click suddenly on July 20, 2019 after not being started for 1.5 days. I had a 3 months old battery so I didn't expect to have a dead battery problem. Called AAA to tow the Pilot to the Honda dealer that installed the Honda battery. AAA towing company jumped the Pilot and checked the alternator. Said I could drive the Pilot to dealer but not to turn off the engine because it seems my battery is defective. Got to the dealer and told the service rep about the dead battery being only 3 months old and was installed by them. The dealer had to jump the Pilot to get it out of the service bay area. According to the note on my invoice (free, since under the Honda 3 year battery warranty), the "Check batter had to be jump started. Battery failed with ED-18 Tester. Test Code 36W-LRVJQ. Replaced battery and is operating to Specs."

I was told that I needed to start the engine every day, but that's not an acceptable solution. What are people to do when they go on a fly-away vacation and leave their car parked for days?