For what it's worth, I have learned my lesson regarding batteries. I will only ever buy batteries from a battery shop. I had 3 Canadian Tire batteries all die within 1 year: never again.
I was told about a shop called Davidson Battery in Vancouver, so I went there to get batteries for my trailer which is parked in the bush by 100 Mile House. They have been awesome! When the batts in my Chevy diesel died, I went to Phil's Batteries in Surrey and got 2 Northern Energys. Tons of crank, great service.
If you have a battery shop in your area, you owe it to yourself to go compare. They know everything about batteries and can answer questions definitively instead of WalMart boy guessing what you want to hear.