I am checking for a friend at work if an Ontario produced Corolla has a Panasonic battery in it from the factory. He's trying to milk the battery for one last year, and I checked it with a DVM and it seems like it should hold up until next Fall. I told him if it isn't Panasonic to just change it now, but if it is clean the posts and put silicone grease on them, reconnect and keep it until next Fall so the Summer can beat up the old battery and he can get full value out of it. His goal is to only purchase this one battery to hopefully last for the rest of the life of the car. He doesn't plan to keep it past 10-11 years, I told him he can easily keep it that long if not longer.