Following a few days of fruitless reload, after consulting all the records on memup sites. (The quick start instructions are too incomplete!) And elsewhere even record on-site memup. Having no precise information on recharging the battery manipulation, by making several test I just noticed the button m24 memup must be "on" device to the stop, so that the battery charging is done. When connecting the USB plug into the PC turned on or the USB power adapter, the display lights there are three choices that becomes visible on the screen: power and given; load; charging and playback .Both last choice if you plug in a usb adapter (5v-500mA), choose charging and playback validate: then loading indicator LED flashes (USB socket next to symbol) .au after charging 2hours 5 control diodes remains lit fixed: and we are fortunate to have a device that works great for about 6 to 8 hours depending on the choice of operation that was chosen! his exeptionnel whether in music or radio mode, very good value!