but if he switch off after for example 1-2 hour of listenig and wont turn on so i think that battery is null. i charge mine all night and after that i turn him on and he turn off

, after i dont know 10minutes he turn on and work for some time but then when i switch it off there was the same situation.
when it all started he just started to hang, no response on buttons, when plug to pc the same situation non usb connection screen.