Archive for the ‘NiCd/NiMH Batteries’ Category

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 After we make up to date tests of the latest Eneloop Pro products as our Eneloop XX AAA test data is already quite outdated.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

1-2v-aa-2100-mah-fujicell-nimh-battery

The 1.2V AA 2100 mAh Fujicell NiMH batteries are the NiMH model from Fujicell with lower capacity as we’ve already tested their 2800 mAh NiMH that ended up more like 2500 mAh. So far the results we’ve seen from Fujicell batteries are very good in terms of available capacity for the price these batteries are being sold at. Not the highest possible capacity and usually a bit lower than the NiHM rating, though they are probably stating the typical and no minimal capacity is mentioned anywhere, but these batteries are available at a better price than most other similar products. Now we are going to test the 2100 mAh NiMH model from Fujicell to see what it can deliver, note that the 2100 mAh rating is probably the typical and the minimum capacity is probably 2000 mah, though it is not mentioned specifically.


1-2v-aa-2100-mah-fujicell-nimh-battery-capacity

Starting the tests of the 1.2V AA 2100 mAh Fujicell NiMH batteries with a low constant current discharge rate of 0.2A got us 2025 mAh as useable capacity and that is not bad, though a bit short from the stated (typical?) rating and acceptable if the battery is indeed a 2000 mAh minimum rating as we suspect. Going for higher load we are still getting pretty good performance in terms of useable capacity out of these batteries. It is interesting to see how the discharge curves for the voltage drop are kind of “grouped” – for the lower and higher current loads we are using for testing.

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

– 2025 mAh at 0.2A load
– 1870 mAh at 0.5A load
– 1613 mAh at 1.0A load
– 1384 mAh at 2.0A load

– 2.456 Wh at 0.2A load
– 2.237 Wh at 0.5A load
– 1.725 Wh at 1.0A load
– 1.458 Wh at 2.0A load


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