HI Jeffery, Wells let me know you are interested in the Non-Battery style chips, instead of replacing the batteries in your original chips. I will explain the differences and let you decide what fits your needs best.
Battery Style Chips-
1.Can be Manually reset by shorting out the 2 copper contacts at the top of the chip
-This is useful when you want to top off your cartridges all at once, instead of 1 at a time, saves time
-Also useful when you need to flush your printer for storage, the 4900 requires you to run the adjustment program 2x to get the flush into the head-You can top off the carts and reset, then run the 2nd Init.Fill
2.Batteries will need to be replaced once a year approx.
-When you have 1 dead battery, it can affect the other chip reads on that side of the printer
-Best to replace all the batteries at once, top off carts and re-install
Non-Battery Style Chips
1.These chips are very accurate at reading ink levels, they will reset themselves only AFTER the cartridge reads empty, you remove, refill and voila, the chip reads full again
-For flush carts, this would mean, you would install and run 1 Init.Fill and not be able to run another, UNTIL you run the carts empty, at which point there is no need of running a 2nd init. fill because you would essential have the flush worked well into your system
-But, if you wanted to do this again, say after you have cleared your clogged nozzles, re-installed your printing inks and then want to store your printer with the flush carts, you would could then swap out your chips from already empty reading chips from other carts and install as a full set
So, you see there is ways around making both style chips work for your needs, they are just different. If you already have the older battery style chips (3 sets from the looks), in my opinion it would make sense to keep them and replace the batteries, which is a very easy task. Please see picture with arrow pointing at the tabs you need to cut off to remove the chip from it's base