battery for R3644

[Benny Blue]

Hey all,
The battery that came with my R3644 Montana has bit the dust and i'm looking for a replacement.
The only identification on the battery is GB4000R.
The manual simply says 12V, 80AH.

I live in Alberta so would be looking for a battery that will be reliable starting in temps as low as -30degC

Any recommendations or suggestions?

 

[Benny Blue]

I got a new battery, installed it, moved the tractor, then a day or two later tried to start it again....but the (new) battery was dead. I checked it with a multimeter and there was barely 1V on it. It is currently recharging.

Key was not left on. Battery and starter connections are tight.

Looking for suggestions where I might find an electric draw that is draining the battery.
I suppose there is a chance that it was just a bad battery so I’ll do a load test on it very soon.

Any suggestions?