Posts Tagged ‘1.2V NiMH battery

It has been a while since we have tested Eneloop batteries, so we were excited to check out what performance we can see from the latest gen Panasonic Eneloop Pro AAA NiMHs. According to Panasonic the BK-4HCDE Eneloop Pro AAA batteries should be able to deliver minimum capacity of 930 mAh, they come pre-charged and are low self discharge, meaning that they should be at retain 85% of their capacity in a year if not being used after a full charge. The Eneloop pro series is intended for high drain devices, meaning that it should handle better under heavier loads, the batteries are also suitable for use in low temperature conditions (-20 degrees Celsius) and are rated at up to 500 recharge cycles (if properly maintained). Of course the Eneloop Pro batteries are made in Japan and with all of the above said they are pretty expensive compared to other competing products, that is why we have high expectations.


The 1.2V AAA 930 mAh Panasonic Eneloop Pro NiMH (BK-4HCDE) batteries manage to deliver slightly more than 900 mAh at lower constant current loads of 0.1A and 0.2A in our tests and that kind of puzzled us, so we have repeated the tests multiple times just to be sure, however without much of a difference… we kind of expected to see the 930 mAh mark covered. Going up to 0.5A load we got at 888 mAh, a really good result and not much lower compared to the lower loads and then, jumping to 1.0A discharge test we see a more significant drop in the usable capacity at 634 mAh. We were a bit disappointed from the results at 0.1A and 0.2A constant current loads, even though the batteries did manage to perform very well at slightly over 900 mAh capacity in the test, we still expected to see a bit more.

The performance of the 1.2V AAA 930 mAh Panasonic Eneloop Pro NiMH batteries in our tests:

– 903 mAh at 0.1A load
– 901 mAh at 0.2A load
– 888 mAh at 0.5A load
– 634 mAh at 1.0A load

– 1.131 Wh at 0.1A load
– 1.103 Wh at 0.2A load
– 1.051 Wh at 0.5A load
– 0.658 Wh at 1.0A load

TATTU is a newer brand of batteries by Gens ace, a popular name for high quality and good priced LiPo batteries among RC enthusiasts. Here we are testing their regular 1.2V AA 2100 mAh TATTU Enerpro NiMH batteries as the company also offers higher capacity 2700 mAh model that we plan to check out soon as well. We have previously tested AA NiMH batteries from Gens ace under their own brand, you can check the results here and compare with the TATTU line if you are interested. The TATTU Enerpro NiMH batteries are low self discharge ones that retain high percentage of their initial capacity oer longer periods of time even when not being used for long time and are rated with up to 1000x recharge cycles.


The 1.2V AA 2100 mAh TATTU Enerpro NiMH batteries are performing quite well in our tests all the way up to the high 2.0A constant load where the usable capacity shows a larger drop. What we are seeing at 0.2A and 0.5A discharge current is a very similar curve and close mAh ratings, though because of the slightly lower voltage at the higher load the gap in the Wh result is a bit larger. What we are seeing here as well as with our previous tests of Gens ace branded NiMH AA cells is that even at 0.2A load (the lowest we use for AA tests) they are performing a bit under their rated capacity, even though their general performance is very good. In both cases you can say the battery rating should’ve been much better if it was with 100 mAh lower that it is being advertised.

The performance of the 1.2V AA 2100 mAh TATTU Enerpro NiMH batteries in our tests:

– 2034 mAh at 0.2A load
– 2026 mAh at 0.5A load
– 1933 mAh at 1.0A load
– 1543 mAh at 2.0A load

– 2.490 Wh at 0.2A load
– 2.392 Wh at 0.5A load
– 2.238 Wh at 1.0A load
– 1.637 Wh at 2.0A load

For more details about the 1.2V AA 2100 mAh TATTU Enerpro NiMH batteries…

The LADDA brand of batteries is owned by IKEA and there are rumors that they are the same as the Eneloop Pro batteries, but much cheaper in terms of price and that is something that we do plan to check and confirm soon. After we make up to date tests of the latest Eneloop Pro products as our Eneloop XX AAA test data is already quite outdated. Do note that not all of the LADDA batteries are the same as some of them are made in China and others in Japan, like the 900 mAh AAA ones made in Japan is the same factory that apparently produces the low self discharge Eneloop batteries. These IKEA LADDA batteries are rated at 900 mAh typical capacity and they do seem to deliver a bit more according to our tests at lower loads making them get a good rating from us thanks to the low price you pay for them.


1.2V AAA 900 mAh LADDA NiMH batteries manage to deliver more than 900 mAh (their capacity rating) at lower current loads of 0.1A and 0.2A in our tests, going up to 0.5A load the capacity you get is still quite good, although a bit below the capacity rating. At 1.0A load which is over the battery capacity rating the usable capacity gets lower, but that is kind of to be expected. Overall very good results for the price you pay for these IKEA batteries, though probably they are best for low to mid-range loads.

The performance of the 1.2V AAA 900 mAh IKEA LADDA NiMH batteries in our tests:

– 926 mAh at 0.1A load
– 925 mAh at 0.2A load
– 863 mAh at 0.5A load
– 588 mAh at 1.0A load

– 1.153 Wh at 0.1A load
– 1.137 Wh at 0.2A load
– 1.013 Wh at 0.5A load
– 0.614 Wh at 1.0A load


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