Mike - It appears my first estimate of the number of grease fittings on the EF-500, 416, was slightly exaggerated. /w3tcompact/icons/smile.gif There are, in fact, only 67, as far as I know now - I fully expect to find another one somewhere sooner or later.
Nevertheless, having pumped three tubes of grease into said 67 fittings, I feel I can now say with some authority that the Lincoln 12v model cordless grease gun performs very well. It has at least as much, if not more, pressure as the Lincoln hand pump model I have.
Also, it's very easy to measure the amount of grease you put in. There's a well-defined stroke of the piston for each "shot" that goes in. I usually hold the trigger down for three strokes of the piston, unless I see fresh grease coming out of the joint sooner. That seems to be about equivalent to three pumps with the hand gun.
I can tell you one thing with some certainty: It sure is nice to be able to hold the end of the hose on the fitting with one hand and just squeeze a trigger with the other. Not only that, but when you've done 67 of them, and used almost a whole tube of grease in the process, you sure are glad of the savings in time and effort.
I haven't had to recharge the first battery yet, much less switch to the second, so battery life is more limited by shelf time than usage for the average person, I suspect.
Frankly, I think the thing will about pay for itself in grease savings in short order, especially if you use synthetic grease, like I do. I used to lose a fair bit to errant squirts when the end of the hose popped off the fitting, but now I can hold it with one hand - no more flying grease! Verdict: Two thumbs enthusiastically up - more if I had 'em.