I was surprised to see that the battery try will accommodate a slightly larger battery. Of course it will also be a bit heavier, but it probably won't cost much more, and it should be more durable than the standard battery.

 

Yeah, I am a tad concerned about it lasting through a sub zero winter but perhaps it will surprise me!

 

older fits have had their group 151R batteries swapped for larger group 51R batteries. I was hoping that the '15 would have the extra space as well.

(Actually, I wish it had room for a proper Group 24. No worries then! )