Maintenance box
A new box comes with a blank chip: it is the route that unlocks without resetting anything.
See the partParts, not keys
Some Epson printers store end-of-service on a chip in the maintenance box. The program does not talk to that chip. This page is from Imprímelo 247, the studio that publishes PadReset. A reset is not for sale here.

You can type with or without dashes: L3250 and L-3250 are the same model.
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The store lists the models on each ad: check the reference on your unit before you pay.
Pick the one that is your case. Each one says when it applies and what it does not do, before showing any link.
A new box comes with a blank chip: it is the route that unlocks without resetting anything.
See the partA device that takes the box chip back to zero, without buying a new chip.
See the partYou can tell by the metal contacts, like the ones on a cartridge. A new box comes with a blank chip and unlocks the printer. If you reuse the box, you need a compatible chip or a physical resetter for that chip. None of the three empties the pad.
It has to be washed, replaced, or the outlet rerouted. Even when the lock is the chip, the ink is still there. A pad link does not reset the chip.
If it lives in the printer's EEPROM, free software resets it. That does not happen on this page.
If your lock is the counter that lives in the printer's EEPROM, free software resets it and it costs nothing. That is explained on PadReset, not here.