Superb performance - Concorde RG-25XC is the way to go!
I live in PA where it gets anywhere from 0 to 100 degrees through the year, and my plane is ON THE RAMP, not in the hanger -- this is the battery for me. I am tired of replacing "normal" batteries every 2-3 years, so this was the easy selection given it is only slightly more in price, but WAY better in reliability. And another thing....no leakage. I have had a battery leak acid on the motor mount causing severe damage to it and destroying the battery box as well. That is EXPENSIVE when it happens and an instant GROUNDING ITEM until the engine is pulled, new mount installed and new battery box installed - ouch! That will never happen with this battery. SKY GEEK provided the best price I could find and also shipped it lightning fast in a well-packed box and battery holder. I am very happy with this battery and service from SKY GEEK. I hope to keep this battery for a minimum of 6 years. I would highly recommend this battery to any pilot.