Here is an interesting fact about cold & batteries.
At -35.6 C you only have 25% of the original amount of CCA available!
Always find an 800CCA battery or greater in cold climates especially Alberta/Parries!
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There are many advantages about an AGM (absorb glass mat) and the Ultra is a good battery at a reasonable price compared to the best most powerful battery an Odyssey at $350 CAN.
You can improve your state of charge by using an automatic charger through the winter.
Manually trickle charging your battery will also greatly extend the life of any battery.
If your battery has removable caps a battery hydrometer will tell you the condition of each cell and if the battery could use charging.
When it's cold, the specific gravity reading will tell you why charging is necessary as well. Charging will warm the electrolyte and add much bonus cranking power.
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The Ultra is probably around 850CCA is fully sealed, (no venting) so you wont get science projects on terminals, and the CT warranty 5 years no questions asked, so u get a new one if it fails.
A load tester will tell you quick how many CCA are available. An electronics version like a Midtronics tester can be safely connected to the battery while everything is still connected.
I would never connect mine to the Jeep without disconnecting Jeep's battery terminals, cause mine draws down 100 AMPs for real. Don't want to damage diodes in Alt or computer or anything like that.
Also adding a 120Volt battery wrap or battery blanket, restores the CCA, which is why so many have them plugged in.
A block heater is a good idea too, as warm up time is greatly reduced and engine starts so much easier, taking the load off the starter & battery as well.
