Thanks for all the info here...but if someone could help me just a little more I'd surely appreciate it...
I got the little digital multimeter at Harbor Freight and it has a battery and is ready to go. The ohm settings start at 200, then 2000, 20k, 200k then 2000k. The instructions say to set it on 200, then when I flip the switch on the meter reads "1". Then they say to "short the test leads together"...I think that means touch the two silver spikey things together? They say it should read "0" but it doesn't...it just randomly flashes a bunch of different numbers.
I have 5 901s that won't work. On 4 of them when I touch the leads (black on threads and red on center) the meter jumps to a big number (like 148.9) then drops and stays on 1. Can I assume these are dead?
On the 1 atty the numbers flash around and then will stay around 4.3 to 4.5. So I'd say this one is alive, but not well.
When I measured 3 new 901s, they all read around 3.4. These are alive and kickin!
Then I have 2 J118 attys that work but run really hot (like they actually burn the juice...it turns brown). They measure in the 4.5 range. Again, alive, but not well. I've never had an atty that actually burned the juice 8-o.
If someone could confirm that my results are correct, or help me if they are wrong, I'd be grateful.