I've used Lexmark x2600 series printers for years, because whenever I need a printer, I could go out and buy one at Walmart, Best Buy, or, before that, probably at Circuit City for about the brick and mortar store price of a printer cable or regular duty cartridge pair. I recently decided that instead of buying new cartridges for $25 or so each, I'd refill at least the black one. I was already aware of the horror stories from earlier in this century about the cartridge manufacturers programming the cartridges to impede refilling by shutting themselves down under certain conditions, but I also saw that the sellers of refill kits on eBay had typically 99% or better satisfied customers, so I figured that it was more practical to spend $5 for a refill kit than to spend more than $5 worth of my time trying to learn from the experiences of others whether I might be successful or not. My refill kit arrived, but I was troubled to see in the instructions that it was a kit to refill cartridge 14A, whereas my printers have been purchased with cartridge 14. Apparently. Lexmark readily acknowledges that the 14A is a refillable cartridge whereas the 14 is a "recyclable" one and Lexmark refills it (probably sending an "advance replacement" cartridge) for $5 less than they charge for a new refillable one. Looking through some old user posts, I see four different explanations of what might or might not go wrong if I try to refill my Lexmark 14 Black: 1) there may be a computer chip in the cartridge that shuts it down, 2) it may let me refill it but keep putting up a false "you are almost out of ink" warning, 3) it may have an internal fuse that blows, or 4) the warnings are all baloney and it will work just fine. Given that these posts were authored over a span of a few years, one reconciliation of them might be that some may have been accurate when authored but then the nature of the cartridge changed. Anyway, I went ahead and poked a hole in my, "Lexmark 14" and refilled it and so far it is working just fine, and if it keeps working, the $5 I spend for the refill kit is going to save me about $100. Did I just get lucky or are putative non refillable Lexmark cartridges really readily refillable?