can i use usb port to power my mp2 player?

tmw4000 · 10-27-2009, 10:16 PM

i have a little mp3 player that i only use when in my room and it eats the batteries up in 60 mins! it runs on one 1.5 V battery and i understand that 2 of the 4 wires within a usbport/cable conduct 1.5 V can u cut up and strip a wire and rig it to the player?( to the battery prongs) will it work? ( if i plug the other end into my laptop when its running? ) can i power my mp3 player like this?

gcavan · 10-27-2009, 11:41 PM

Quote:

i understand that 2 of the 4 wires within a usbport/cable conduct 1.5 V

This is incorrect, Vbus on all versions of USB carry +5volts. Here is a link giving the pinouts.

http://www.hardwarebook.info/Universal_Serial_Bus_(USB)

Quote:

can u cut up and strip a wire and rig it to the player?( to the battery prongs) will it work? ( if i plug the other end into my laptop when its running? ) can i power my mp3 player like this?

Obviously, a direct connection isn't a good idea. It could be done but you will need a regulator to drop the voltage.

10-27-2009, 10:16 PM	#1 (permalink)
tmw4000 Registered User Join Date: Aug 2009 Posts: 6 OS: windows XP	can i use usb port to power my mp2 player? i have a little mp3 player that i only use when in my room and it eats the batteries up in 60 mins! it runs on one 1.5 V battery and i understand that 2 of the 4 wires within a usbport/cable conduct 1.5 V can u cut up and strip a wire and rig it to the player?( to the battery prongs) will it work? ( if i plug the other end into my laptop when its running? ) can i power my mp3 player like this?