It is a 5002 ACER Aspire notebook. Sometimes my notebook will say that it's charging, while other times it'll say that it's running on battery power even though it's plugged in. Often I have to play around with the wire part that's close to the notebook, by bending in in certain ways or moving the part that connects to the notebook from different angles, to get it to work? Sometimes if I leave it alone long enough while still turned on and plugged in, it'll run out of electricity. I went to different stores, and all of their universal notebook AC Adapters were $90-$120. I went online to ebay, and a lot of them are about $15 for the specific type I need. Other cheap online computer stores have similar prices. However, I've heard that you should be careful about super cheap online computer stores, because sometimes they rip you off by not including many parts of the product with the package and often won't come with a warranty, saw that on a news article. So I don't know if I should just buy a universal $90 one from Wal-Mart, get something off of ebay for $15, or find some other way to fix the problem?