How long does it take to recharge an MP3?

Read the manual for your specific mp3 player. Some can charge in a half hour some take about 5 hours. I charge my Sansa MP3 player for about 2 hours for a good charge but 1hr... sometimes overnight...

http://www.askyourpc.com well you also usually charge things for longer the first charge so just leave it in for the first couple hours then you have nothing to worry about