How important is battery reserve time?

[dparm]

Advance Auto Parts' 40% off coupon is very tempting. It would make my $137 battery only $82. The reserve capacity is 100aH; the NAPA and Carquest versions of my battery are even longer at about 120-130aH. No coupons...so full price at $133.

Is the extra reserve time worth $50? CCA are virtually the same.

 

[brianl703]

Probably not, and how is the reserve capacity specified on both batteries? Depending on the discharge rate, it can go up or down.