Did it analyze your batteries correctly? I looked at that, how does it work?
I just got it earlier this evening and I've played with it a bit. It's going to take a while to figure out how useful it's going to be. Here's what I got so far.
The "instructions" were a few cryptic notes on a small folding card and no help at all. It took a moment to figure out how to use it. There are 4 functions. Charge, Max Amp, Capacity, Internal Resistance.
I tried the charge function. With a one month old freshly charged HG2 at 2A (its only charging rate) it went up to 4.23V. Seems to give a good voltage reading because it showed as 4.23 on my Xtar.
Then I went into the Capacity function. It asks for a cutoff voltage which I set to 3.6V because that's around where I normally take batteries out for recharging. I don't know what cutoff the manufacturers use for their advertised capacity. It also asks for amp draw. I set that to 3A because that's what my trusty Solo says I'm using. Does that mean the capacity depends on the amp draw you run at?
Starting at 4.23V the voltage flew down to 4V in a few seconds with less than 10mah of capacity showing. I would have expected it to drop faster at the start but not that fast. Makes me think getting a charger that stopped at 4.0V might be a good idea. It hung around 3.8 / 3.7 for a long time which I would expect.
It stopped at 3.75V showing a capacity of 1336 (3000mah battery). It did go down to 3.6V but when the run stopped it popped up to 3.75V so I guess there's some kind of rebound going on. The battery got barely warm but the body of the tester was much warmer. Some buzzing and vibration while it ran.
Recharged the battery and ran Capacity again with the same settings. It showed capacity of 1321. That's not bad in terms of consistency. Maybe it would have been closer to the first number if I had let the battery rest a bit longer after I charged it. I'll need to do a bunch of runs to get a clear picture.
Then I tried it with another month old HG2. Ran Capacity with a cutoff of 3.2V. It showed a capacity of 2434. The battery level display still showed one bar so I guess I could have run it a bit lower and seen a bit more capacity.
Guess I'll go on playing with it. Try older HG2's and some other batteries. If the numbers are consistent for the same battery and go down with older batteries, at least that will give me a clue about how much the batteries are losing over time. I have a 5 year old AW sitting around, interesting to see how much capacity that one shows.
Drawing a steady continuous 3A all the way down is a lot different from what happens to a battery in normal use, like a few seconds of draw at a time over a couple of days. Don't know how much that would affect the measurable capacity.
Haven't got into Max Amp or Internal Resistance functions. It's going to take a while to get an idea of how valuable it's going to be and how I'm going to be able to use the results. So far I think it's a nice bit of kit. Maybe after I've played with it a bit more I'll post in the battery section.