whats the diff between the red, yellow, and blue top optimas? anyway peterson's did a battery comparo with the optima blue top d34m, pro comp hdx, odyssey pc1200, and performance distributors dyna-batt. some specs(manufactor's ratings):
odyssey pc1200:
voltage: 12.84
cranking amps: 1200
cold cranking amps: 550
reserve capacity:78 minutes @ 25 amp load
size: 7 3/4 x 6 1/2 x 7
weight: 38.2 #s
recomended shelf life: 2 years @ 77*
optima d34m:
voltage: 12
cranking amps: 870
cold cranking amps: 750
reserve capacity: 120 min. @ 25 amp load
size: 10 x 6 3/4 x 7
weight: 43.5 #s
dyna-batt:
voltage: 13.5
cranking amps: 300
cold cranking amps: 220
reserve capacity: 24 min. @ 25 amp load
size: 7 x 3 x 6 1/2
weight: 13.5 #s
recomended shelf life: 2 years @ 77*
pro comp hdx:
volatage: 12
cranking amps: 950
cold cranking amps: 750
reserve capacity: 100 min. @ 25 amp load
size: 10 x 6 1/2 x 7 1/4
weight: 41 #s
recomended shelf life: 1 year @ 77*
they did 3 tests:
test a: recorded their own ratings with and battery analyzer
test b: used a mile marker 9k # winch on the 5kxj to conduct a 74' 5" pull, pulling the USD up up the street. set start and finish lines, and recorded times with a stop watch.
test c: vehicle runtime and distance travled with the alternator removed from the electrical system.
odyssey pc1200:
voltage: test a: 12.74 test b: 13
cranking amps: test a: 1058 test b: 1187
cold cranking amps: test a: 854 test c: 956
winch test time: 6 min. 26 sec.
vehicle runtime and distance travled: 46 min. 33 sec. and 47 miles
optima d34m:
voltage: test a: 12.94 test b: 12.94
cranking amps: test a: 1238 test b: 1242
cold cranking amps: test a: 998 test b:1005
winch test time: 6 min. 28 sec.
vehicle runtime and distance travled: 1 hr. 26 min. 44 sec. and 58 miles
dyna-batt:
voltage: test a: 12.7 test b: 12.8
cranking amps: test a: 889 test b: 971
cold cranking amps: test a: 715 test b: 784
winch test time: 6 min. 53 sec.
vehicle runtime and distance travled: 44 min. 35 sec. and 29 miles
pro comp hdx:
volatage: test a: 12.8 test b: 12.74
cranking amps: test a: 1273 test b: 1302
cold cranking amps: test a: 1027 test b: 1050
winch test time: 6 min. 58 sec.
vehicle runtime and distance travled: 1 hr. 25 min. 16 sec.
also, i saw that optima has a newer better yellow top in one of the recent mags. couldnt find it though.