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Old Nov 13, 2006, 07:36 PM
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Tenergy AA NiMH 2600mah cells

Just ordered a dozen of the AA Tenergy NiMH 2600mah cells. Does anybody have any comments on these particular cells? I've read good things about the 2300's but nothing yet on these cells. I'll post back here when I have an opinion of my own.

Matt
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Old Nov 13, 2006, 08:54 PM
kit
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They seem to be as good as their 2300ma nimhs. I received them on 11/2 and gave them a 30 minute fast charge with no c/10 forming first charge. They've been sitting on the table since then, 11 days ago. Just measured the voltages...which range from 1.35 to 1.38 volts.

30 minute fast charger...

http://www.all-battery.com/index.asp...OD&ProdID=1322
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Old Nov 13, 2006, 09:33 PM
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Just what I was looking for. Those Tenergy 2300s look like they have good dna. Thanks for the tip.
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Old Dec 27, 2006, 04:55 PM
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Just got my new MH-C9000 WizardOne charger so I can officially get some numbers for these cells now. Just put four of the Tenergy AA 2600 cells on it in 'break-in mode'. That's a 16 hour 0.1C charge, rest one hour, 0.2C discharge, rest one hour and then a 16 hour 0.1C charge. Will probably take near 2 days to complete. After that I'll cycle at normal rates a few times and then get some real numbers on usable capacity at a reasonable TX draw rate (300mah). Then I'll get some voltage values after different resting durations (1 day, 3 days, 1 week, etc.)

Matt
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Old Dec 28, 2006, 02:05 AM
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Are the Tenergy AAs industry standard diameter, which I believe is 13.5 to 14.5 mm (0.531 to 0.571 in)?

Thanks, Bill
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Old Dec 28, 2006, 06:52 AM
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I'll check the 2600 size when I get home from work this evening.

Matt
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Old Dec 28, 2006, 09:58 AM
Southern Pride
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I checked 8 at random and the max. dia. point was 0.564" ,max. length 1.975".
I have several MiniMag Lites one of which many recharagebles will not fit in but all of my TENERGY 2300 fit without a problem.

Charles
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Old Dec 28, 2006, 04:42 PM
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Tenergy 2600mah dimensions

diameter (at thickest point on the cell) >> 14.42mm/0.5675"

height incl. button >> 50.28mm/1.9795"
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Last edited by mattalbr; Dec 28, 2006 at 04:54 PM. Reason: change radius to diameter
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Old Jan 05, 2007, 03:44 PM
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After numerous cycles I'm getting right around 2300mAh +/-50 out of these cells at .2C discharge down to 1V. I keep forgetting to see how much capacity is lost over time but will remember to measure this eventually.

Matt
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Old Jan 05, 2007, 04:25 PM
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Charles and Matt -

A belated thank you for the cell dimensions.

Bill
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Old Jan 05, 2007, 04:36 PM
Master of 1 point landing
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Quote:
Originally Posted by mattalbr
Just ordered a dozen of the AA Tenergy NiMH 2600mah cells. Does anybody have any comments on these particular cells? I've read good things about the 2300's but nothing yet on these cells. I'll post back here when I have an opinion of my own.

Matt
Ill let ya know - I have two dozen waiting in box on my stoop for me when I get home. The couple of reviews Ive read said that are great, but show really only 2500mah capacity - thats fine for me. It allows me to rid myself of my energizer 2500mah nightmare.
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Old Jan 06, 2007, 08:13 AM
Southern Pride
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So TENERGY 2600s 12 cost $17 and th 2300s are only $20 for 24 plus a free charger.

http://www.all-battery.com/index.asp...OD&ProdID=1350


This will come as a shock to many but the higher capacity serves no practical purpose in most applications and in fact often is more harmful than helpful.


Charles
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Last edited by everydayflyer; Jan 06, 2007 at 08:40 AM.
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Old Jan 06, 2007, 11:14 AM
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Hello Charles,

What? You mean that bigger numbers don't mean that they are better?

How can that be? That just doesn't seem right...

Sorry, I just had to get that out of my system...

I just picked up some 2000 mAh Tenergy cells and am getting ready to do some testing on them. I know, they are really labeled 2300 mAh, but that rating seems optimistic based on some early findings.

Overall, I have been very impressed with the consistent results from almost all of the 2000 - 2400 mAh cells, regardless of brand. It seems they got these cells right, then screwed things up by making the cells less robust with the high capacity cells. 2000 mAh seems to be the sweet spot right now.

Tom
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Old Jan 06, 2007, 11:39 AM
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Hi Tom,

What more can I say?

http://www.rcgroups.com/forums/showp...6&postcount=33
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Old Jan 06, 2007, 12:02 PM
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Quote:
Originally Posted by everydayflyer
So TENERGY 2600s 12 cost $17 and th 2300s are only $20 for 24 plus a free charger.

http://www.all-battery.com/index.asp...OD&ProdID=1350


Charles
charles,
That item's gone, empty, no longer available, dead. Try and order it.
Many moons ago after you had first tried them I went back and tried to order that special..no luck. He who hesitates is lost.
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