that says 425 CCA... it's a 660 CA 1700PEAK amp battery box.
it's not really strong enough to start our cars with a dead battery, it's fine to assist in cold weather starting, but you better hook it up PRIOR to starting your car. not after your battery fails to start you.
for serious dead battery assists on our cars, you need a commercial 1200 CA which would be 900 or so CCA probably around 3000Peak amp packs... about 250.00

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!