We have now different for the 2nd time "cheap variants" of the HP 901XL bought printer cartridge. First, all three cartridges funnktionierten well and were compatible with our printer. However, all three rounds were relatively quickly unusable. We thought they were empty. As we have now cleared up at a store on "replica variants", we once looked at the expiration date of all three rounds. This was already in 2011 or 2010. If the weight of the "empty" Considering cartridges, these cartridges were actually not really empty, but simply no longer useful. We are now again switched to the original cartridges that are so expensive maybe twice, but ultimately Print longer.
