I stopped making cycles. The aa ended up with a total of 2300 mah, mesured at a discharge of .5 and .7A (max of my charger)
Willing to see full tests from HKJ on these
Have you contacted him and asked if he queue them up?
Not bad for 2000mAh rated batteries!
I guess the 2300 are the charging capacities not discharging….
Totilde which tools did you use?
I have an old AAA nimh in which my hobbycharger charged 2050mAh……….discharge capacity is near to zero.
no, it is discharge capacity. Im using a bc700 charger, (but i made i mistake when posting, the discharge currents were .25 and .35A. I posted the charging capacities, the results are for that currents)
It seems pretty accurate, im geeing about 2000-2100 with 3gen eneloops
it just finished the last cell, which was discharging at.1A, but the value in this one was lower, 2.13A. I suppose the temp variation had something to do with that, the other tests were done when the house was warmer.
this was the fourth cycle, in the fist one the values were a bit lower than 2000
I can’t make a discharge test with higher current, but I´m going to check the difference in brightness of my EA4 when powered with these and with eneloops (edit: to see if the can provide at least the current needed by that light. If so, they are good enough for me)
Initial AA discharge measurements:
1: 1516
2: 1574
3: 1550
4: 1563
All discharged @ 500mA
1550mAh avg, 2000 claimed 77.5% left after 5 months
AAA ones: 606mAh avg (left the 500mAh discharged one out of the calculation), 750mAh claimed so 80,8% left after 2 months
Break in on the AA’s is now running so it’ll take a couple of days before I can do further testing.
I did already saw that the last minutes the voltage drop was pretty significant.
When I looked I saw some discharge rate around 1450mAh and a voltage of 1.06… around 15 minutes later the batts were done and thus 0.9V under a load of 500mA. More precise measurements will be taken once the break in is finished.
I will use datapoints from my accucel 6 and will attach my multimeter as well since there is a voltage difference between them (around 0.1V for lithiums, don’t know for nimh) so this will provide 2 reference points
Thanks for this
I understood you are making the calculations of that loss assuming they came from factory with those 2Ah, but the initial charge has to be lower. In my first charge i got only 1.9Ah, and after 4 cycles it increased almost 400mAh. I think the long term storage tests must be done after break-in capacity measurements, and not based in claimed capacity
It is really difficult to measure discharge capacity with BC700/BC900 in discharge mode without monitoring the display all the time. The moment a battery is exhausted the display starts from zero and counts charge capacity as it starts charging automatically. When finished it shows charge capacity, not what we are interested in!
I always use Refresh Mode to measure discharge capacity as the display will keep the result for the last discharge cycle.
Yeah, I wanted to add but see I forgot
“Assuming they came with the claimed capacity from the factory”
I am planning to do long term storage tests, but since those take months to complete this is the only bit of LSD info there is right now. And in my opinion 75% after 6 months would already make them suitable enough and better alkaline alternative than regular rechargeables.
And for as far as my understanding of LSD’s goes, self discharge should become lower the less capacity they have.
So if they would do for example 75% in 6 months, 70% in 1 year and 60% in 2 years they would still be great for clocks and remotes and such.
But time will tell. Batteries are labeled with numbers so further results will be compared against the same battery every time.
ok, clear as water!
Okay, test results gonna take a bit more time.
Apparently the power plug of my maha c9000 became very sensitive to movement and my c9000 resetted during the discharge I don’t know how far it already was, so I’m doing a 400mA discharge now and will restart the break-in after that.
Ah well, a day waisted but another cycle on them so hopefully this will also produce a higher capacity.
Here are the results of the break in test on the AA’s
1: 2090
2: 2077
3: 2063
4: 2125
2088 avg
Don’t know why #4 is that far of from the rest, but at least the capacity is more than claimed.
Break in on the AAA’s is now running.
I’m doing a discharge test on some other batteries right now, so will do the load test later if there is still time or tomorrow.
Will also need to find a better way to monitor, as my webcams aren’t able to capture the accucel 6’s screen. Shows up as 1 blue lightbar. Or maybe I will only monitor multimeter voltages
Will also do a eneloop discharge test to compare the results to this charger.
Thank’s very much Johnny for the test results. I’m having six packs of theese on my christmas wish list for replacing several alkalines in the household. I guess I don’t have to panic erase that wish list so far.
Are thes availabe as six pack?
Yes, six packs of four.
(If stock is high enough)
Oh that’s quite a bunch of batteries.
Those are pretty much the same of my third cycle, in the fourth it increased a bit more… Don’t you plan to give it a try?
I’m going to load test first. I might also try to capture a 1A discharge on the maha c9000. After that they will be empty again and will need recharging for the storage test so that’s at least another cycle. I might do 1 more discharge after that to set the numbers for the LSD calculations.
And in the end I don’t really care if they will be 2050 or 2150. They exceed the manufacturers claim so that’s already good. I rather have underrated batteries than overrated 
Yeah, of course, I’m more than happy with them too!
I’m working on the load test now.
Test will include:
LADDA #1 (already tested)
LADDA #2 (topped of in a intellicharger i2)
Eneloop 2nd gen (topped of in a intellicharger i2) (already tested)
Eneloop 3th gen (topped of in a intellicharger i2)
GP recyko (topped of in a intellicharger i2)
Because I did/do not know for sure how full the eneloop and recyko would/will be I had/have to top them off again.
Because the LADDA #1 had to do it with the break in charge it had from a day ago I decided to test a second battery also topped off again.
They might behave different due to heating up and such, therefor it would not have been a fair comparison in my opinion if it was the only battery not charged again.
Measurements are being done by waiting untill the I2 says battery is full, then letting it cool down for 15 minutes, then start the load test. Maybe it’s not enough cooling time, but all batteries will be tested against the same conditions and same settings on the charger so results will be comparable I guess.
Measurements are taken from my multimeter that shows a 0.1-0.12V higher voltage than the accucel 6, and I do trust my multimeter measurements more than I trust the accucel reading. (Although it’s just a 8$ multimeter, I feel it’s more accurate and also has 3 digits behind the decimal point which gives better results).
Cutoff voltage is still set @ 0,9V at the accucel so termination might be a bit too soon, but they will all suffer from this.
Every minute a picture is taken of the multimeters screen. This means I have to look at around 120 pictures per battery, type out the voltage in excel and plot a graph.
I still have 3 batteries to go and have a birthday dinner and party later on, so final results will probably come in tomorrow.