Cartouches d'encre Epson 603

Capacity, and nothing else. The two are the same shape and fit the same nineteen printers, but the XL holds considerably more ink. Unless you print very little, the XL works out cheaper per page and saves you changing cartridges as often. There is no harm in running a standard 603 in one slot and an XL in another.

No, and this is the mistake we see most often. The XP-3100 takes 603XL; the XP-3200 takes 604XL. The same split runs through the XP-2100 and XP-2200, and the XP-4100 and XP-4200. Check the badge on the front of the printer before you order.

Usually the chip. Take the cartridge out, wipe the small copper contact with a dry lint-free cloth, and push it back in until it clicks properly home. If the XP-2100 still refuses it, switch the printer off at the wall for a minute and let it re-read the slots on startup.

No. Under UK consumer law your warranty stands whether you use Epson ink or ours. Your printer will show a non-genuine cartridge message when the 603XL goes in, which is a notification rather than a fault. Acknowledge it on screen and it carries on printing.