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Thread: >> AAA/AA NiMH Capacity CPF Member Tested - Please Participate - Now with Summary <<

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    Flashaholic* EngrPaul's Avatar
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    Wink2 >> AAA/AA NiMH Capacity CPF Member Tested - Please Participate - Now with Summary <<

    Let's have one place to put all capacity test results for various AAA and AA cells. It will be interesting how different brands test vs. their rated capacity.

    As you get new results, add them to the end of the thread.

    Please use 0.2C discharge rate, after a 1-hour rest, post-charging. Also be sure to use a break-in regimen if the cells are new, or have been sitting idle for a while.

    One report per cell please. Use the best value achieved.

    SUMMARY AVERAGE of all posts:
    (Updated 21 Jan 07 - Thru Post #66)
    Green indicates a newer "Low Self Discharge" battery
    Note that lower capacity standard-self-discharge cells are probably older cells, and may perform poorly due to their age.

    "AAA"
    Assia 1250: 938 [75%] (C9000); 1030 [82%] (BC-900)
    Duracell 1000: 973 [97%] (C9000)

    Energizer 700: 556 [79%] (C9000)
    Energizer 850: 750 [88%] (C9000)
    LaCrosse 700: 650 [93%] (C9000); 689 [98%] (BC-900)
    LaCrosse 800: 648 [81%] (BC-900)
    Powerex 1000: 938 [93%] (C9000)
    Rayovac Hybrid 800: 805 [101%] (C9000)
    Sanyo 900: 879 [98%] (C9000)
    Sanyo 1000: 946 [95%] (C9000)
    Sanyo eneloop 800: 803 [100%] (C9000); 816 [102%] (BC-900)
    Tenergy 1000: 825 [83%] (C9000)

    "AA"
    Accupower 2900: 2440 [84%] (Duratrax ICE)
    Duracell 2650: 2713 [102%] (BC-900); 2451 [92%] (Duratrax ICE)
    Energizer 1850: 1627 [88%] (C9000); 1930 [104%] (BC-900)
    Energizer 2100: 1736 [83%] (Triton)
    Energizer 2200: 2117 [96%] (C9000)
    Energizer 2300: 2043 [89%] (C9000)
    Energizer 2500: 2268 [91%] (C9000)
    GP 1700: 1506 [89%] (C9000)
    LaCrosse 2000: 1689 [84%] (C9000); 1861 [93%] (BC-900)
    Lenmar 2000: 1404 [70%] (BC-900)
    Powerex 2300: 2013 [88%] (C9000); 2370 [103%] (BC-900)
    Powerex 2700: 2682 [99%] (C9000); 2492 [92%] (Duratrax ICE)
    Rayovac Hybrid 2100: 2125 [101%] (C9000)
    Sanyo 2500: 2443 [98%] (C9000)
    Sanyo 2700: 2629 [97%] (C9000)
    Sanyo eneloop 2000: 1951 [98%] (C9000); 2080 [104%] (BC-900)
    Tenergy 2600: 2099 [81%] (C9000)
    Titanium LSD 2100: 2048 [98%] (C9000)

    MY PERSONAL RESULTS

    Test device: Powerex MH-C9000 charger/analyzer

    AAA Cells:

    Energizer
    850 mAh: 695, 772*, 737, 796*. ; *=charge termination failure

    Powerex
    1000 mAh: 962, 936, 924, 931, 918, 926, 955, 921.

    Sanyo
    1000 mAh: 975, 996, 989, 988.
    eneloop 800 mAh: 780, 779, 790, 777, 788, 802, 797, 796, 789, 804, 786, 803, 792, 804.

    AA Cells:

    Energizer
    1850 mAh: 1644, 1609.
    2300 mAh: 2025, 2027, 2067, 2030, 2090, 2093, 2002, 2013.
    2500 mAh: 2225, 2180, 2192, 2194.

    Powerex
    2300 mAh: 1997, 2013, 2018, 2024
    2700 mAh: 2645, 2656, 2651, 2657, 2630, 2654, 2672, 2663.

    Sanyo
    2700 mAh: 2513, 2506, 2527, 2565.
    eneloop 2000 mAh: 1909, 1938, 1880, 1913, 1954, 1898, 1902, 1900, 1946, 1908, 1907, 1898, 1920, 1897, 1957, 1889, 1891, 1873, 1897, 1927, 1895, 1919, 1874.
    Last edited by EngrPaul; 01-21-2007 at 09:37 AM. Reason: Updated data

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    Flashaholic* Erasmus's Avatar
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    Default Re: >> AAA & AA Capacities as Tested - Please Participate! <<

    Here are some tests I performed on my BC-900 : http://www.candlepowerforums.com/vb/...d.php?t=130078

    Great idea by the way! Good luck!

  3. #3

    Default Re: >> AAA & AA Capacities as Tested - Please Participate! <<

    This is a great idea now that so many of us have the same charger/analyzers! I only wish I'd recorded my results somewhere...

    Remember the C9000 waits an hour after charging before beginning the capacity test + discharges to 1.0v, while the BC-900 doesn't wait and discharges to 0.9v. So we should expect to see higher numbers from the BC-900.

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    Default Re: >> AAA & AA Capacities as Tested - Please Participate! <<

    It's going to take a long time to test all my cells but here are some results for eight Assia 1250 mAh AAAs:

    Code:
    MH-C9000 capacity	BC-900 capacity
    924			 1028
    940			 1011
    949			 1034
    949			 1034
    934			 1017
    936			 1033
    933			 1034
    969			 1041
    For the BC-900 results I let the cells charge normally at 500 mA then trickle charge for about 6 hours after they finished. I then restarted the charge cycle to repeak them, rest another 5 minutes, and then did a charge/test.

    The MH-C9000 results were done with the break-in cycle (capacity = 1000 mAh). The BC-900 results are about 10% more due to both instrument error and not waiting an hour between charge and discharge.

    I'm working on a spreadsheet with all my results but I have 24 Assia 1250 mAh AAAs, 24 Assia 3000 mAh AAs, 64 Nexcell AAs (50 1800s and 14 2300s), plus a bunch of assorted Nicads. I'm getting another MH-C9000 to speed up my testing.

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    Flashaholic* Newuser01's Avatar
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    Default Re: >> AAA & AA Capacities as Tested - Please Participate! <<

    BC-900
    La Crosse 800 mAh AAA = 541, 706, 657 , 689

    Cant even get a matched set!
    Noob
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    Flashaholic* Erasmus's Avatar
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    Default Re: >> AAA & AA Capacities as Tested - Please Participate! <<

    Quote Originally Posted by Newuser01
    BC-900
    La Crosse 800 mAh AAA = 541, 706, 657 , 689

    Cant even get a matched set!
    Hmm that's weird, I remember the La Crosse batteries I got were all above rated capacities and each set of 4 were the same capacity. Maybe you can try to refresh them?

  7. #7

    Default Re: >> AAA & AA Capacities as Tested - Please Participate! <<

    Good idea!
    I will post my results as soon as I get to my office tomorrow.
    However, 'd ask all the participants to indicate mode of operation and charge/discharge currents. Without this information, the results er a bit ambigous.

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    Default Re: >> AAA & AA Capacities as Tested - Please Participate! <<

    I will add more cells as they go through the C9000 on "Break In" mode (entered cell capacity rating from the label).

    AA

    Rayovac Hybrid 2100 (made in China):

    (set 1) 2126, 2124, 2135, 2130
    (set 2) 2093, 2132, 2140, 2116


    Sanyo 2500 ("HR" made in Japan):

    2438, 2430, 2449, 2453


    Energizer 2500 ("HR" made in Japan):

    2335, 2331, 2342, 2346


    GP 1700:

    1544, 1498, 1455, 1525


    AAA

    Rayovac Hybrid 800 (made in China):

    810, 806, 809, 793


    Sanyo 900 (made in China):

    884, 881, 907, 894
    Last edited by not2bright; 01-15-2007 at 09:43 AM.

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    Flashaholic* Newuser01's Avatar
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    Default Re: >> AAA & AA Capacities as Tested - Please Participate! <<

    Quote Originally Posted by Erasmus
    Hmm that's weird, I remember the La Crosse batteries I got were all above rated capacities and each set of 4 were the same capacity. Maybe you can try to refresh them?
    It has run thru 3 cycles with slow charge before I tested them on test mode on BC-900. I can try refresh, but really don't think it would improve!
    I'm running them now and if they change I'll post the results.

    Regards.
    PS. I'm charging up the AA LA Crosse cells on test setting with 500 d/1000 C now. Soon as these are done.
    Noob
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    Default Re: >> AAA & AA Capacities as Tested - Please Participate! <<

    Used the Break-In setting on my C9000.

    Titanium 2100 (low self discharge): 2010, 2073, 2082, 2096, 2032, 2034, 2024, 2032

    Additional info: prior to running the Break-In on this battery I did a discharge run and came up with 1717mah. The batteries were last charged as a set in July of this year. This battery remained unused during the intervening time.

    Edited Post: added 3 additional batteries.
    Edited again to add the last 4 Titanium 2100's

    Brian
    Last edited by bwm; 01-06-2007 at 06:20 PM.

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    Default Re: >> AAA & AA Capacities as Tested - Please Participate! <<

    I've been running tests on several different battery brands with various capacities the last few months. The last batteries I tested were some Accupower AA 2900 mAh NiMH batteries.


    AA Cells

    Accupower

    Test Procedure: Forming charge of 0.1C for 16 hours on a Sirius Pro Former, then 4 discharge/charge cycles on a Duratrax IntelliPeak ICE charger using 0.2C for the discharge and 0.5C for the charge. One final discharge, then charged at 0.6C with a 0.05C trickle charge for 4 hours. Waited one hour after pulling off the charger, and discharged at 0.2C. I did several other test cycles using the same charge procedure but discharging with a CBAII--the test results from the CBAII were very close to the results from the ICE charger. EDIT: I forgot to mention that my discharge tests were performed to 0.9v per cell.

    2900 mAh NiMH: 2440

    Powerex

    Test Procedure: I used the same procedure described for the Accupower tests above.

    2700 mAh NiMH: 2492

    Greg
    Last edited by gdhumphreys; 01-09-2007 at 09:43 AM.

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    Flashaholic* Newuser01's Avatar
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    Default Re: >> AAA & AA Capacities as Tested - Please Participate! <<

    Duracell 2650 mAh. AA (Green and black cells). About 10 cycles on these cells. BC-900 - test mode 1000C/500DC.

    2.72 , 2.76 , 2.64 , 2.73

    Good!
    Noob
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    Flashaholic* EngrPaul's Avatar
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    Default Re: >> AAA & AA Capacities as Tested - Please Participate! <<

    Nice results on the Duracell, Noob1

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    Flashaholic* EngrPaul's Avatar
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    Str Re: >> AAA & AA Capacities as Tested - Please Participate! <<

    Oops, I read my charger at the wrong time (charging, not discharging).

    Results will be reposted above.
    Last edited by EngrPaul; 01-04-2007 at 09:40 PM. Reason: mistake

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    Default Re: >> AAA & AA Capacities as Tested - Please Participate! <<

    Quote Originally Posted by EngrPaul
    So far MAHA Powerex cells are the only ones testing better than their rated capacity!
    It is interesting to see the different ranges at which the various cells test. I have tested 4 Maha Powerex 2700 mAh NiMH cells on the CBAII, and they averaged in the mid 2400 mAh range, even at 0.2C. On my BC-900, they averaged in the mid 2700 mAh range.

    These tests were performed before I got the Pro Former and ICE charger, so I am going to put these same cells through a forming charge and 4-5 discharge/charge cycles, and then retest them. I'll post the results in this thread when I'm finished.

    Greg

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    Default Re: >> AAA & AA Capacities as Tested - Please Participate! <<

    Quote Originally Posted by EngrPaul
    So far MAHA Powerex cells are the only ones testing better than their rated capacity!
    Just after your post I updated my findings from the ROV Hybrid cells from Wally World. They all came in above the stated 2100 mAh capacity. I'll start the second set tonight and in a quick 39 hours have the results from 4 more of them.

    As they are priced well below the eneloop I'm hoping these things hold their charge for 9 months as advertised!

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    Flashaholic* EngrPaul's Avatar
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    Default Re: >> AAA & AA Capacities as Tested - Please Participate! <<

    I had to retract my Powerex 2700 measurements. I was used to coming home twice a day to analysis results.

    I was doing a 36+ hour break-in on these cells. I just happened to pick off values during charging, thinking it had already discharged and results were available on the screen. But the actual discharging is happening now!

    4 Powerex 2700 results will be posted tomorrow.

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    Default Re: >> AAA & AA Capacities as Tested - Please Participate! <<

    Energizer 2100mAh NiMHs, 3.5 years old.

    Cycled on a Triton, one cell at a time (took a couple days)
    Charge and discharge rate were both 1A,
    charge termination dV/dT = 3mV
    discharge to 0.9V

    Code:
    cell	Chg	Dsch	Vavg	datecode
    1	1854	1740	1.12	0305
    2	1929	1832	1.13	0305
    3	1884	1789	1.11	none
    4	1869	1764	1.10	none
    5	1789	1657	1.16	0305
    6	1748	1634	1.11	0305
    These cells were used intermittently in a Lux V mag mod at 750mA, often stored in a hot or cold garage and allowed to self discharge for a few weeks at a time on a regular basis. As you can see, the output voltage is quite low, indicating high internal resistance. These cells are probably at the end of their useful life.

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    Flashaholic* EngrPaul's Avatar
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    Default Re: >> AAA & AA Capacities as Tested - Please Participate! <<

    Quote Originally Posted by EngrPaul

    4 Powerex 2700 results will be posted tomorrow.
    The results were consistently 98% of their rated capacities (first post updated).

    These Powerex batteries are excellent!

  20. #20
    Enlightened piper's Avatar
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    Default Re: >> AAA & AA Capacities as Tested - Please Participate! <<

    These results are from my first set through my MH-C9000.

    Energizer AA 2200 (these live a tortured life of high usage followed by months of idle time):

    2111
    2134
    2113
    2108

    Energizer AAA 700 (oldies but seem to be ok)

    532
    565
    537
    589
    Last edited by piper; 01-06-2007 at 07:39 PM.

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    Default Re: >> AAA & AA Capacities as Tested - Please Participate! <<

    Lenmar Nomempro. Dark blue/light blue wrapings. 2000 mAh rated.

    Testing cicle (3 times) 1000Charge/500Discharge. BC-900

    1292
    1303
    1682
    1338


    These are pretty new and proly have about 10 cycles on them. But really really bad showing. Guess you get what you pay for! And 3 testing cycles fails to bring up the capacity. I doubt that they will improve with re-fresh cycle at all but will give it a try.



    Regards.
    Noob
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    Default Re: >> AAA & AA Capacities as Tested - Please Participate! <<

    Quote Originally Posted by Newuser01
    Duracell 2650 mAh. AA (Green and black cells). About 10 cycles on these cells. BC-900 - test mode 1000C/500DC.

    2.72 , 2.76 , 2.64 , 2.73

    Good!


    Are you serious??? That's better than the Powerex 2700's..

    And they have shelves and shelves of them at Walmart. And I don't have to pay shipping..

    Hmm.. Duracell rocks. I should have known.

    The much touted Sanyo 2700's are actually starting to look pathetic. That and with their apparent higher then normal discharge rate and cell failures..

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    Flashaholic* Newuser01's Avatar
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    Default Re: >> AAA & AA Capacities as Tested - Please Participate! <<

    InfidelCastro: This is the only set I have. I'm planning to pick up more for my digicam. But you should see my other cells that are so ..........
    See above post above your's.
    Regards.
    Noob
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    Default Re: >> AAA & AA Capacities as Tested - Please Participate! <<

    Quote Originally Posted by InfidelCastro
    Are you serious??? That's better than the Powerex 2700's..

    And they have shelves and shelves of them at Walmart. And I don't have to pay shipping..

    Hmm.. Duracell rocks. I should have known.

    The much touted Sanyo 2700's are actually starting to look pathetic. That and with their apparent higher then normal discharge rate and cell failures..
    I thought the Duracells were made by Sanyo?

    I say that because I have the duracells and while they are tested to at or above their capacity. The discharge rate is quite ridiculous. I can't give any exact data on it, but let's just say that if I let them sit for a couple of days. They will need to be charged up quite a bit to be full again.

  25. #25

    Default Re: >> AAA & AA Capacities as Tested - Please Participate! <<

    How about putting this on the wiki so it's easy to consolidate stuff and update.

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    Default Re: >> AAA & AA Capacities as Tested - Please Participate! <<

    Quote Originally Posted by djtrackie
    I thought the Duracells were made by Sanyo?

    I say that because I have the duracells and while they are tested to at or above their capacity. The discharge rate is quite ridiculous. I can't give any exact data on it, but let's just say that if I let them sit for a couple of days. They will need to be charged up quite a bit to be full again.

    All the NIMH batteries I've had have pretty high discharge rates.

    Do you have access to a voltmeter or something so you can read us the voltage after a couple days? What charger do you use? If I don't use batteries for more than three days I generally charge them up again.

    If I know I'm not going to be using batteries for at least a few days I put them in the freezer. This slows down the discharge rate in NIMH batteries greatly. Turns them into Eneloops.

  27. #27
    Flashaholic* Newuser01's Avatar
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    Default Re: >> AAA & AA Capacities as Tested - Please Participate! <<

    Okay. 1 more set. BC-900 1000 c/500 d. Refresh.
    Energizer 1850 AA Silver color cells.
    1997
    1853
    1949
    1922
    Hmmmm.....
    A Little note: on high discharge rates. There have been a lot of talk about this in other threads. For me, I just top them off approporate for what I will be doing. Say, photo shooting with my digicam, I will load a topped of set in camera and extra topped off set in camera bag. For flash light use, just cycle batteries with topped off cells every 2 or 3 weeks at the max.That's just me!

    Regards.
    Last edited by Newuser01; 01-08-2007 at 03:27 AM.
    Noob
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  28. #28

    Default Re: >> AAA & AA Capacities as Tested - Please Participate! <<

    http://candlepowerforums.com/vb/show...=119022&page=1

    The Duracell 2650mAhs were good when they were new. After <50 cycles, one suffered mortal high self discharge, two significant loss of capacity, other five, still ok.

  29. #29
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    Default Re: >> AAA & AA Capacities as Tested - Please Participate! <<

    Quote Originally Posted by evan9162
    Energizer 2100mAh NiMHs, 3.5 years old.

    Cycled on a Triton, one cell at a time (took a couple days)
    Charge and discharge rate were both 1A,
    charge termination dV/dT = 3mV
    discharge to 0.9V

    Code:
    cell	Chg	Dsch	Vavg	datecode
    1	1854	1740	1.12	0305
    2	1929	1832	1.13	0305
    3	1884	1789	1.11	none
    4	1869	1764	1.10	none
    5	1789	1657	1.16	0305
    6	1748	1634	1.11	0305
    These cells were used intermittently in a Lux V mag mod at 750mA, often stored in a hot or cold garage and allowed to self discharge for a few weeks at a time on a regular basis. As you can see, the output voltage is quite low, indicating high internal resistance. These cells are probably at the end of their useful life.
    Here are the same cells, but charged at C/10 for 14 hours, then discharged at 400mA (C/5)

    Code:
    cell	IEC Dsg	Vavg
    1	1922	1.17
    2	1815	1.18
    3	1835	1.18
    4	1821	1.17
    5	1663	1.21
    6	1771	1.17
    modest improvment for some, large for one. Interesting that the lowest capacity cell retains the highest voltage during discharge.

  30. #30
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    Default Re: >> AAA & AA Capacities as Tested - Please Participate! <<

    I finally completed the break-in results on my Assia 1250 mAh AAAs:



    Of course they're nowhere near their rated capacity but they're pretty close to the best available AAA cells. Also their self-discharge is very decent-in roughly 3 months they only lost about 20% (the few that lost more were probably because I put them in something for testing).

    Self-discharge results were at 500 mA on the C9000. The BC-900 capacity tests were done at 200 mA discharge. After the cells were full I let them trickle for about 12 hours and then I repeaked them twice before finally doing the capacity test in "test" mode. The capacity results on the C9000 were done using "break-in" with an entered capacity of 1000 mAh so that the discharge current was the same as my BC-900 tests.

    I plan to eventually test the accuracy of my two BC-900s by discharging cells on the C9000, putting them through a forming charge, letting them rest an hour, and finally discharging them on the BC-900. This will ensure the same charging algorithm and initial conditions on both chargers. Any capacity difference will be due to error on the BC-900. Once the error for each slot is known, I can correct for it by adjusting the current sense resistors for that slot.

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