My 2011 Honda Pilot wouldn’t start the other day, so I jumped it and went on. It sat outside for 8-9 hours and started right up, however later that day it was dead again. The voltage was reading just over 12.5 on the battery. I attempted to start it and it dropped to 12.3. I jumped it and it started right up. Once running it holds around 14.1V so I imagine it’s not the alternator. And based on the battery voltage I am assuming it’s not the battery. Any ideas?