I bought an acer aspire1, model no.Zg5 a month ago at a pawn shop , It now will not charge the battery,When I used it I would keep it plugged in the wall all the time. Is it my plug or the battery? Can u help me

If working fine while plugged in, that would indicate the battery is probably shot

Only way to know for sure is to get another battery

Acer Batteries - Acer Laptop Battery products from AtBatt.com (http://www.atbatt.com/laptop-batteries/b/acer.asp)

You can find other sites with Google about Acer batteries