how can i fix my sony erricsson w595?

i had no battery and recieved a text, my messages were full and i had to delete some files so i did, then my phone just all went blank and turned off, I turned it back on it would not let me look at my contacts, also all of my messages and call logs had disappeared and it said "no network coverage" I plugged in my charger and a message popped up on the screen saying "battery cannot be charged, you must use a sony erricsson battery." And my sim card works fine in another phone, HELP!!