I happened across this post while looking for a battery for my E53. I was looking at the Duracell Platinum agm posted above and found that the regular Duracell actually has better specs for $121.87
CA at 32 degrees F: 1105
CCA at 0 degrees F: 900
RC:185
https://m.samsclub.com/ip/duracell-a...49/prod3590267