as far as the charging problems are concerned, if you cant buy a battery then you can always try changing the usb cable and ac adapter first buy buying it from a local conventional mobile shop.
most and almost all players which have memory above 2gb are hacked. so i suggest you to try this to recover your real memory and avoid any problems as far as music and video playback are concerned.
http://www.mympxplayer.org/how-to-re...ck-vt2400.html