The Brother MFC-L3780CDW's XL black cartridge stretches to 4,500 pages

The MFC-L3780CDW uses the same TN229 cartridge family as its sibling the L3720CDW but with different standard yields — black starts at 3,000 pages and colors at 2,300, which is already better than the L3720’s baseline. The TN229XL black pushes to 4,500 pages and the XL colors to 3,000. A starter set comes in the box, so you’ll get a feel for the standard yield before deciding whether the XL premium is worth it for your volume.