I lost the charger to my digital camera....?

Can I charge it through the USB port on my computer, because it seems to work with a dead battery plugged into the USB?.

I don't know of any cameras that charges through a USB port. You must be thinking of an MP3 player.

no, not ususally
go to te store and buy a new one, they usually sell them

Go to Radio Shack and buy a charger!