Thanks for the testing and results. Alot of good info.
Is it really though? Brian's comments got me thinking further. I'm gonna make a almost certain probable guess that Brian has been running a 722 longer than me. He has had problems with the onboard charger witha range of batteries. Mine works perfectly with the Sony, but not the Impact. Which begs a couple of questions.
Did SD see that they had some probelms with the onboard charger and change it at some point, optmized and QC'd specifically to the Sony.
So does Brian have a SD722 "B" for example while I have a SD722 "C".
Or is it something else. As I'm sure anyone on the board who has engineering/manufacturing production experience like myself can tell, many products are made with a consistant "core" set of components but often some of the peripherals rotate in and out fairly often based on sourcing, just-in-time inventory maintenance, sometimes failures of JIT inventory maintenance where the company has to get something in fast etc etc.
Now I think we would all agree the production value on the SD&xx series is high. If they change parts no doubt each source passes some kind of QC first. But it's still not the "same" part.
So my question is, tapers, sure a lot of us run these things but we are not a huge market either. Any ideas what the total market on the SD series is? Because if it is below a ceratin level, then it may be reasonable to assume that yes, there may be a at most a few "flavors" of SD722 floating around like "A,B,C,D".
But if the market is big enough, there could also be so many slight variations on the 722 out in the field where and for whatever they are being used for, that if a bunch of us stacked a set of SD722s we would all have "SD722"s and there might not be many, or even one, that were in fact "identical" in terms of what's inside.
At the end of the day I think all we may be able to say for sure is "I can't really tell you buy a Sony not and Impact, I can only tell you how it the specific battery behaved on my specfic box", and other people can tell you the opposite experiences of their own.
At this point I would reiterate the obviouys -
you just have to be sure to test whatever you have before you take it out the first time, and I would also add, after "a full charge" if it does not show a full charge on the unit, you need to probably keep an eye on and have a plan on switching it out after say a set or an opening act.
I think I will run the Impact Friday at Penn's Landing for Levon Helm just to see how different it is in the field. But the the Sony will definitely go in before Phil Lesh cranks up.