Topic: Rechargeable high voltage 1.6V 2500mWh AA nickel-zinc technology

[su6oxone]

Wonder if the issue might lie with the companies making these NiZn batteries rather than the technology itself.  If reputable battery makers, like Energizer, Duracell, Sanyo, and perhaps Maha, made these types of batteries perhaps they would be more reliable?  I found this article from Engadget of NiZn batteries made by another manufacturer that they have tested extensively:

http://www.engadget.com/2009/11/09/powergenix-nizn-rechargeable-aa-batteries-finally-some-cells-w/

Very intrigued by this new battery tech.

[gmm6797]

if anyone actually tries these, I would be curious what the results are

[Gutbucket]

I just received my charger and set of 4 AA's...

Dave, have you continued using these?  Have they worked well over time?

Thinking of trying them in the Tascam DR2d which doesn't seem like the lower voltage of the NiMH at all.

[twatts (pants are so over-rated...)]

I'm thinking of picking some of these up for my HD-P2...

http://www.amazon.com/PowerGenix-ZR-PGX1HRAA-4B-Charger-Rechargeable-Batteries/dp/B0029NZVZ0
http://www.amazon.com/PowerGenix-ZRPGX-AA8-High-Voltage-Rechargeable-Batteries/dp/B002NJUJ16/ref=pd_cp_e_1

Terry

[Gutbucket]

Those are the ones I'm considering as well.

[twatts (pants are so over-rated...)]

Hmmm....  Misleading...  2500mWh = 1550mAh... 

These do have a quicker recharge, though... 

YMMV...

Terry

[tim in jersey]

Hmmm....  Misleading...  2500mWh = 1550mAh... 

These do have a quicker recharge, though... 

YMMV...

Terry

Out of curiousity, what is the math for calculating  mWh>mAh?

[twatts (pants are so over-rated...)]

Hmmm....  Misleading...  2500mWh = 1550mAh... 

These do have a quicker recharge, though... 

YMMV...

Terry

Out of curiousity, what is the math for calculating  mWh>mAh?

W/V = A 

2500mW/1.6v = 1550mA (+/-)

So if you have 8x of these for 12.8v, and your device has a draw of 500mA at 12v, these batteries will run the device for 3 hours (1550mAh/500mA = 3h).

I run a Tascam HD-P2, that has a Power Consumption of 6W @ 12V, or 0.5A (500mA).  These batteries would run me about 3 hours.  This makes sense, I currently use a set of Duracell NiMH that are 2650mAh and I get about 4.5 hours out of them. 

http://www.tascam.com/details;9,11,52,19.html

Terry

[ArchivalAudio]

any one try these out yet?

here is their website statement
http://www.powergenix.com/environment.php
http://www.powergenix.com/techhistory.php
http://www.powergenix.com/applications.php

sounds promising

thanx
--Ian

[Johnny Thunder]

I'm waiting with baited breath to see what develops here. I'm currently investing pretty heavily in MaHa chargers and AA's, as well as Sanyo Eneloop AA's and AAA's. Where those are concerned, I think everyone can agree that they're well tested now and very stable. This N-Z tech seems promising, but I'm not biting until I see some results, especialy how long the batteries last as far as discharge - recharge cycles. Might the loose peak voltage over time? Might the peak start to fall off rapidly as they see more recharge - discharge cycles? Questions abount, and I thank the OP for making the purchace and starting to put these things through the paces. I'd sure like to participate in testing as well, but money's non-existant for additional expendatures at present. Let's hope these batts prove to be everything they claim!

-JT

[Gutbucket]

Picked up 8 Powergenix AAs and the quick charger.  My several year old low self-discharge NiMH AAs (Maha Imedion) still run my R-09s for ~5+ hours, but will not run the DR2d for more than a few minutes.  Figuring that deck may not like the lower voltage of NiMH, I'm trying these.

The nickel-zincs charge very, very fast.  Initial tests in the DR2d battery hog ran it for about 2.5 hrs, recording in dual channel mode (2 stereo tracks) which is the only way I use that recorder.  I ran it a bit on vacation and think they may have started getting more time after some cycling, but I'll have to test that.  BTW, if looking at the Powergenix, the quick charger (white) is the better choice, primarily becasue it has independent circuits for each battery as well as charging faster without penalty. It's only a few dollars more than the 3-5 hr rapid charger (black) which only has 2 circuits instead of 4, charging the batteries in pairs.

[Johnny Thunder]

http://en.wikipedia.org/wiki/Nickel-zinc_battery

[ArchivalAudio]

does anyone know if the fact they run 1.6 v would over volt any thing  that needs 3v ie 2x 1.5v (AA) like the Sony M-10?
I think these would be perfect for it but wouldn't want to damage  the unit.
since 2 X 1.6 would = 3.2v instead of 3v

just wondering if anyone has any insight?
thanx
--Ian

[Gutbucket]

Shouldn't be a problem.  Any gear that could not handle a nominal 0.2V supply over-voltage would be very poorly designed indeed.  That's probably within the tolerance range of standard 1.5V AA alkaline cells anyway.

[ArchivalAudio]

Shouldn't be a problem.  Any gear that could not handle a nominal 0.2V supply over-voltage would be very poorly designed indeed.  That's probably within the tolerance range of standard 1.5V AA alkaline cells anyway.

thanx that's what I kinda figured