Complete DX Modification ( CDM ) - Dark Visor Zwei : Card Reading Function II

I transplanted DX Dragvisor Zwei's circuit board to the previously modified DX Dark Visor Zwei.  Though the new circuit board is smaller, it still has no space for large capacity batteries (i.e. non button cells type).  To make it worse, this circuit consumes current heavily and button cells especially the flat LR1130 cannot last long at all, despite supplying it now with a 4.5V supply instead of its original 3V... The sound volume is also super soft due to the button batteries type used... Anyway, am satisfied already... Too many other things on hand to worry about...