Well I've been somewhat disappointed with this second set of refillable cartridges, and the response from CIS. So I suppose I should give good news when there is some. I saw on the forum someplace a user that "reset" his cartridges after every refill. I've not seen that instruction any place but I decided to go whole hog and went out and acquired a complete set of new batteries. I replaced the battery in each cartridge one at a time, then refilled it, then "reset" it. When I installed the first one it came up OK!! The second and third and fourth worked fine also. I'm now up on a complete set of refillable cartridges for the first time in many months. PTL!!! In Jesus name they will continue to work for a long time.