aight my friend gave me a razor with out a charger and I can't seem to charge the damn thing.

I've tried a usb cord that charges my brothers blackberry through the computer, and his wall charger won't charge it either.

do razors require a charger that puts out a higher voltage? cause when i put it in my brother blackberry wall charger it turns on but won't charge.

also how do i hook this to the computer so I can put music on it? I plug it in but nothing pops up