MrSquash

Many thanks for these ideas! In the meantime our vehicle spent 6 days of testing at the Ford dealership with the month old 67R battery and a brand new one, and the service folks concluded once again that it was a bad battery. So we have our car back and a no charge invoice. Fingers crossed! I love my lithium jump starter which fits into the glovebox and takes only 2-5% of the charge to start our Hybrid on the coldest days. But I had no idea they could be used as a regular starter battery. As for using a larger battery, I believe the current 390 CCA is more than ample to start a hybrid when the battery is healthy since the HVB kicks in almost instantly to assist.

I'm a brand new member reacting to the post from murphy dated Oct 24/19. My wife has loved driving her 2010 Fusion Hybrid in Toronto for 12 years now, and would keep it forever if not for frequent 12V battery failures and SYNC speakers that have been randomly on/off since 2016. Her first 12V battery lasted over 7 years, but the five since have lasted only 3 months, 16 months, 1 month, 30 months and 1 month in that order! They have failed in both summer and winter, always with no warning whatsoever. Admittedly she averages only 2500 miles a year, but she consistently drives it every other day. The latest battery is actually totally dead, with my trickle charger failing to get any juice back into it whatsoever. These batteries have mostly been replaced free of charge by Ford under warranty. But not the same day, and the unpredictable hassle and inconvenience has been soul destroying for both of us. Our local Ford dealer, the Canadian Automobile Association and an awesome independent service guy we use have all invariably said we’re stuck with the OEM BXT-67R battery. So I’m incredibly intrigued to see you indicate an AGM replacement is an option! Could you please provide the AGM manufacturer/product# or specifications I should pursue, and whether you would expect that Ford would be prepared to install it for me. Ford is ditching sedans and doesn’t seem to know its own products very well so I’m happy to go out on a limb here and get the potential fix done elsewhere. We’d be very happy to pay a significant premium to avoid the dead battery issue in future. We finally bought a compact jump starter last year, but the hood froze up a couple of months ago and therefore my wife needed roadside assistance anyways!