Hi Audioguru,
Thanks for your reply. I dont know what u mean by "transistor radio"size, but it is one of those rectangular ones, it is by Sony and on the front it says "9V Ni-MH 270mAh" but on the back it says "For 9V Applications (6F22) P-22H 270mAh 8.4V". I hope I have answred your questions...