Battery Pack Dem

Battery Pack - an E-Club Pro Select routine. Available for a limited time at www.markleveri... for just £7.00 (or £3.50 for members of E-Club Pro).
The magician picks up card box as if to demonstrate a card trick and discovers that it rattles! Opening it, he tips from within four 3 volt circular batteries!
Taking one of the batteries into his fist, he squeezes it and on opening the hand it is seen to have changed to a more powerful AAA battery.
Holding this battery at fingertips, the performer passes his other hand across it and causes it to visibly change to a larger AA battery.
Finally, he clasps his two empty hands together and on parting them reveals that now a square 9 volt battery has magically appeared!
No gimmicks required, just a card box and a few batteries plus some low level sleight of hand.