Advanced format ruling
Batteryman C
Card effect (current official text)If all "Batteryman C"(s) you control are in Attack Position, all Machine-Type monsters you control gain 500 ATK for each "Batteryman C" you control. If all "Batteryman C"(s) you control are in Defense Position, all Machine-Type monsters you control gain 500 DEF for each "Batteryman C" you control.
Current rulings for this card are maintained by Konami.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Advanced forum — sourced change requests get reviewed.