Well, given how much money that OEM's make off of aftermarket stuff, and given that all the printer companies have done this to lock out competitors to this rather lucrative cash cow market, forcing the previous 3rd party vendors to switch to remanufacturing, it's not hard to believe that the other companies will do the exact same thing. Of course, a little hack and patch and you're back to 100% again with a 3rd party battery. The only thing that'd stop them from selling the battery is if the OEM made it a DMCA offense to hack the firmware or fake who you really are.

As for the question of battery capacity, your total number of cells determines your top end charge capabilities. For smart batteries with smart circuits, and a unified cell design, you simply control the maximum charge by changing the cell firmware. So by rights, a 1200mah battery and a 2500mah battery of the same size and form factor are identical (assuming the unified cell design), save for the cell firmware.

Now as for the 1930mah battery, I call fake on that. It's got too much that cries fowl about it.