The Dell Inspiron Mini 1210 is a entry-level notebook released by Dell in October 2008 and retired on August 7, 2009. Here you will find several guides for the Dell Inspiron Mini 1210.
Hi, Dom! It's a really safe bet to buy directly from the manufacturer. You'll be safer when it comes to getting a warranty. Amazon.com sells these batteries, but they're sold third-party, so you may not get a full warranty.
Here is Dell's Inspiron Mini 1210 tag search page: