I recently received a new walkman NWZ-S545 and plugged it into my laptop. After it's charged to full and I left it in there for the rest of the day after 5 pm, I unplugged it and went to school with it the next morning. The battery dies on me before I even get there. I return home and charge it for about 8 hours and the next day it dies about an hour later. The problem I've noticed after charging it all day last night and watching it die at nearly 2 pm is that the battery probably drains while its in standby.
Why does the battery drain on my 16gb S545 in standby/off while my 8gb S545 doesn't even get close to the second to last bar by the end of the day? Do I have to charge it for 24 hours? What should I do?