Hi scott,
I posted it elsewhere online, my apologies, I forgot here, here's a paraphrase:
The packaging and products build quality are first rate, as good as name brands like Energizer or Duracell.
Charger
It not only shuts off based on reaching the final voltage, but has a backup timer to prevent overcharging. It works as described with the LED being RED when charging, and turning green when charge completed. The charger is very small and pocket sized.
Battery
The end charge voltage of these cells are 9.7V, so one can be sure its anything but a 6 cell 9v.
I was skeptical whether these batteries were truly low self discharge. After 1 mo since I charged 3 tenergy batteries and the Agilent supplied 9V together, and after this time, the standard NiMH has self discharged to 8V while these cells are still 9.7V!
The discharge curve is a decaying natural log, and measured to uV levels you can track uV drops daily until it plateaus at 9.7V.
The higher number of cells on these Tenergy unfortunately makes the battery meter on the Agilent less helpful, as it appears full all the time, until its near its end, then the graph drops fairly quickly and the low bat icon appears.
I did compare the tenergy 9V against eneloop 1.25V AA cells, the eneloops have an edge in retention over time, but its fairly small. But strictly speaking that's 9V vs 1.25V and things could be different for the construction of 1.25V AA tenergy cells. You'd have to weigh the cost difference.
I noticed someone [ tenergy?] posted comparative data at Amazon. Here's an important one, total charge/discharge cycles, and they are fairly close. This is fairly extreme use, discharging at 1C continuously will shorten the cell life, but good testing!
![](http://ecx.images-amazon.com/images/I/61hwvy6vhCL.jpg)
NB: The 1252a is a fantastic DMM. Great for home labs, fast, accurate, I use it more than my other DMMs and the 1272a I have on tests. One side issue for me is the rubber coating on the body is flaking off mine, and it isn't a year old, its mostly on the hand contact areas and particularly on the rotary knob. The beep is wimpy, but otherwise a great DMM.
Saturation,
How are the discharge rates on the Tenergy batteries looking now?
I think I'm about to pull the trigger and get some of these for my 1252.
A little off topic, but have you ever compared the Sanyo Eneloop AA's against
the Tenergy equivalent? I'm thinking if they did a good job with the 9v battery,
they may be worth a look for AA and AAA LSD batteries as well.
Luckily they are all available from Amazon -- If you can't buy it at Amazon, it probably
shouldn't be bought :-)
Scott