Advanced format ruling
Portable Battery Pack
Card effect (current official text)Select 2 "Batteryman" monsters from your Graveyard and Special Summon them in Attack Position. When this card is removed from the field, destroy those monsters. When both of those monsters have been removed from the field, destroy this card.
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.