I just pulled mine out today to inspect and check the water levels. A few relevant findings:I know the OE CRV battery is wrapped with insulation, but how about the bottom?.......any insulation on the bottom as well?
Since the battery sits above a very toasty CVT (215F+ tranny temps observed daily for months now), I don't think removing battery insulation, so the battery box will accommodate a bigger battery, would be a good idea.
There is plenty of physical space for a larger battery, and there is not any external insulation on the bottom. Also my car has 35k miles and is 27 months old and all cells were low but the outer two had the plates exposed. I was able to fit about 75-80mL in those outer ones, so they did evaporate quite a bit (doesn't everyone have tiny graduated cylinders in their kitchen?).
The outer plate on the negative side has some corrosion from exposure I assume (will a conditioner remove or is it permanent?)
To kloker's point, it seems to be pretty common to buy the parts and make the swap on older CRVs, but no one has done a proper tutorial on here confirming that it works on the gen5. If no one does it before June I will.