New Battery for Dell Inspiron 1520 - Search recommendable providers

Hello, 
since my Dell Inspiron 1520 battery is now completely wide, I am looking for a replacement. Although Google spits out several things really seriously not seem to me to some pages but. www.all-laptopbattery.com/dell-inspiron-1520.html although such does not look wrong, but a missing address in the imprint somehow seems daunting. Therefore, the question if anyone has experience with relevant online stores. Please no e-Bay dealer account is not available on my part ;) Thanks in advance :)