What battery specifications does the Big Blue 400 Pro use?
The Big Blue 400 Pro uses a 12V battery with 570 cold cranking amps, 100 reserve capacity, Group 35 designation. The battery is connected via a positive cable (45 inches, No. 1 AWG) and a negative cable (42 inches, No. 1 AWG).
From the official Miller Big Blue 400 Pro Welding Machine manual, page 4
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