Just recieved my I nickel MP4 player from UXCELL. charged the battery and used it til the battery needed charging again but it will not accept a charge now from usb or the wall charger. I am going to try to find a repalcement locally but the battery has no markings so I need to know what the voltage rating is. I have noticed that a lot of players run off of a 3.7 volt battery. Is the I-nickel the same. Any help will be greatly appreciated
