GerryAZ said:
My 2011 and 2015 were frequently parked unplugged at 50% to 70% SOC for up to 4 weeks at a time without incident (except once when I left Bluetooth adapter plugged in to OBDII port and Android device running LEAF Spy on the seat--12V battery in 2011 was dead when I returned after only 6 days). Also 2015 drained 12-volt
battery while parked over weekend when early 3G TCU locked up (issue was permanently resolved when dealer replaced TCU with later version). Longest so far for 2019 has been 2 weeks at the airport. I have never connected an external 12-vo!t charger to any of my LEAFs (DC-DC converter in each Leaf keeps or kept the 12-volt battery charged with my driving/charging/parking use patterns). I jump-started the cars on the rare occasions when I returned to dead battery and let DC-DC converter charge battery while driving and charging.
This is a bit confusing. Are the "rare occasions when I returned to dead battery" incidents the ones referenced above? I guess you're saying the "rare occasions" of dead battery didn't ruin the battery?
Our 2013 Ford CMax (96k miles) is about to have it's 4th battery replacement, as the 3rd OEM Ford replacement battery lasted 21 months. Full warranty replacement, but a royal PIA because of the inconvenience. I just purchased a $100 Schumacher "Power Pack" lithium jump starter, and will keep it in the car. Ridiculous that Ford has yet to figure out how to prevent random parasitic drain in their CMax/Fusion hybrids.
We've NEVER had an issue (of any kind!!!) with our 2014 Toyota Avalon Hybrid, now at 101k miles. Still love the car, a solid 41mpg on the highway, although the squooshy (is that a word?) ride can get a little annoying (I spent 35 years driving VW/Audis...haha)
Thanks all for the interesting thread. I always learn something here.