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FORUMS General Gear Talk Flash and Studio Lighting 
Thread started 12 Apr 2009 (Sunday) 16:35
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6,560 FLASH POPS LATER: The Results of "AA" Rechargeable Battery Tests

 
SYS
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Apr 12, 2009 17:43 |  #16

int2str wrote in post #7716603 (external link)
Great test!

Was the flash set to manual? If so, what power output?

Because I used the old flash from film photography years that is not compatible with my DSLR camera, I popped the flash by pressing on the pilot button when the flash's capacitor was at full, signified by the red light. See on the first page regarding the comparative difference between the 300EZ and 580EX. By the "Guide Number" 300EZ has weaker output than the 580EX, but I don't have the info as to how much exactly.



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SYS
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Apr 12, 2009 17:49 |  #17

unrlmth wrote in post #7716612 (external link)
What did you use to charge them? A higher charge rate will cause them to have a little more "pop" when fully charged and a slower charge rate will cause them to last a little longer?

Also do you have any data on the mah that each of the batteries hold?

See above post #2 for the charger I used and the mAh info...

As for charging rate, I don't like to charge NiHM batteries at any lower than 200mA and any higher than 500mA, and all tested batteries were charged in this manner.



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monty28428
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Apr 12, 2009 18:05 |  #18

Graphs, Pictures, Tables!! (LOL - just kidding)

Very nice set of tests.




  
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SYS
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Apr 12, 2009 19:02 |  #19

monty28428 wrote in post #7716714 (external link)
Graphs, Pictures, Tables!! (LOL - just kidding)

Very nice set of tests.

Thanks, Monty. We actually do have graphs and charts (photos provided already ;) ), but these are very simple kinds that my son created for his Sci Fair. His graphs and charts do not display those detail information to be useful here... :)



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tetrode
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Apr 12, 2009 19:10 |  #20

SYS wrote in post #7716640 (external link)
...I popped the flash by pressing on the pilot button when the flash's capacitor was at full...

So, do you have a thumb like Popeye now?

Thanks for taking the time to report your findings. Very informative and helpful.

Dave F.




  
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SYS
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Apr 12, 2009 20:30 |  #21

tetrode wrote in post #7716995 (external link)
So, do you have a thumb like Popeye now?

Thanks for taking the time to report your findings. Very informative and helpful.

Dave F.

Thanks. Fortunately for my thumb, I had a month's period to spread out the repetitive abuse. My son's thumb was employed, as well... :)



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Apr 12, 2009 20:42 |  #22

very scientific approach..

lots of data.. and lots of hours..

so what holds true is higher mAh the better the performance..

good work

phamster


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SYS
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Apr 12, 2009 21:16 |  #23

phamster wrote in post #7717461 (external link)
very scientific approach..

lots of data.. and lots of hours..

so what holds true is higher mAh the better the performance..

good work

phamster

Yes, against my initial skepticism, "higher the 'mAh' the stronger the performance" came through consistently. Even Energizer Rechargeable that I despised performed better than eneloops that I so admired.

eneloops were pleasantly consistent in their "low self-discharge" showing....

I also learned that not all "low self-discharging" claiming batteries are same. I was expecting MAHA Powerex "Imedion," for instance, to be about the same as eneloop, but I'd trust eneloop as the most reliable in this category...

MAHA Powerex 2700mAh, on the other hand, came through really impressively, such that I've now changed my strategy in how I use my rechargeable batteries, that is, I'd use Powerex as the main horse and rely on eneloops more as back up or in situations where I need to use in intermittent situations and applications.

The alkaline was surprising how poorly it performed... I was expecting them to be a bit stronger...



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Apr 12, 2009 21:27 |  #24

SYS wrote in post #7717695 (external link)
Yes, against my initial skepticism, "higher the 'mAh' the stronger the performance" came through consistently. Even Energizer Rechargeable that I despised performed better than eneloops that I so admired.

eneloops were pleasantly consistent in their "low self-discharge" showing....

I also learned that not all "low self-discharging" claiming batteries are same. I was expecting MAHA Powerex "Imedion," for instance, to be about the same as eneloop, but I'd trust eneloop as the most reliable in this category...

MAHA Powerex 2700mAh, on the other hand, came through really impressively, such that I've now changed my strategy in how I use my rechargeable batteries, that is, I'd use Powerex as the main horse and rely on eneloops more as back up or in situations where I need to use in intermittent situations and applications.

The alkaline was surprising how poorly it performed... I was expecting them to be a bit stronger...

i work in quality at Subaru.. i am responsible for lots of the over all quality @ subaru for Specs, Regulations, New Model Development and Training for upcoming models in the Subaru line are also my responsibility at Subaru.

so reading your Methodology and applying a well thought out approach to comparing your objects was great.

it is all about making a plan, collecting your data and collating your results to a usable output for others and yourself to read.. (you did awesome)

now for me.. my useage of batteries are pretty much the same as yours..

i have one of those MAHA 8 bay 69 dollar unit.. and lots of 2700 MaH batteries.. so before a wedding job, i always charge up 4 sets of 4 2700'S and also carry 16 back up alkalines in my back pack.. but never have used the alkalines yet..

and i make sure i charge all my batteries up the day before the big job.

thanks for doing this cool research.. i am sure it is going to be made a STICKY !!!

phamster


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SYS
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Apr 12, 2009 21:38 |  #25

Thanks, phamster, for your kind words. :D



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Apr 12, 2009 21:39 |  #26

Yeah FORGET YOU ENELOOP YOUR OVER PRICED! Wooooo!

Overpriced, highly advertised, over hyped electronics = BIG FAIL.

Sorry this thread got me REAL excited haha. Go electronics! And no I have no credibility as to how expensive Eneloop is, I just know they are highly advertised, and I thought I saw them going for much more than other stuff, so I concluded they were probably crap anyway! WOO!


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SYS
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Apr 12, 2009 21:47 |  #27

jcw122 wrote in post #7717850 (external link)
Yeah FORGET YOU ENELOOP YOUR OVER PRICED! Wooooo!

A LOT cheaper than alkalines, though, and I'm willing to bet a lot cheaper than other rechargeable kinds with eneloop's 1,000 + chargeability in its lifetime...

eneloop is NOT overhyped. They performed exactly as they advertised...



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unrlmth
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Apr 12, 2009 21:48 |  #28

SYS wrote in post #7716663 (external link)
See above post #2 for the charger I used and the mAh info...

As for charging rate, I don't like to charge NiHM batteries at any lower than 200mA and any higher than 500mA, and all tested batteries were charged in this manner.

I was meaning the actual amount the charger put in the batteries from a discharged state. Not the actual manufacture specs which can be off.

200mA and 500mA is a pretty low charge rate. I usually charge mine at around 1.5-2.5A depending on the batteries and how much of a hurry I am in.




  
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blam
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Apr 12, 2009 21:49 |  #29

I love my eneloops because I can always rely on them, but as your tests confirmed they definitely aren't the strongest. I find mine dont have very good life when in use compared to my old sanyo 2500mahs on full charge

great test! 2 thumbs up and thanks for sharing.


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Apr 12, 2009 21:51 |  #30

Thanks for doing the test, SYS, I really enjoyed reading it. Very well done!


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6,560 FLASH POPS LATER: The Results of "AA" Rechargeable Battery Tests
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