Can a domestic 7.2 volt Ni-cd charger for remote control models be adapted to fit a foreign made battery pack?? (The pack is also 7.2 volts) The wire lead clip with round and square hole on the end is only about 2/3 size of the one on the charger. Also will this pack even accept a charge from the chargers sold in stores? I think the pack was made with the toy by Echo Toys of Hong Kong. Thanks!