Edison Format · March 2010
If an effect is chained that removes 1 of the 2 targeted 'Batteryman' monsters from the GY, the remaining 'Batteryman' monster is Special Summoned. When this 'Batteryman' monster is removed from the field, "Portable Battery Pack" is destroyed.
If 1 of the 2 Special Summoned 'Batteryman' monsters is flipped face-down, when the remaining 'Batteryman' monster is removed from the field, "Portable Battery Pack" is destroyed. The 'Batteryman' that was flipped face-down remains on the field.
If an effect is chained so that you have only 1 empty Monster Card Zone when "Portable Battery Pack" resolves,, choose 1 of the 2 targeted 'Batteryman' monsters to be Special Summoned; the other remains in the GY.