Posts Tagged ‘Gens Ace NiMH battery’

1.2V AA 2100 mAh TATTU Enerpro NiMH Battery Tests

27, Feb 2019

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…

1.2V AA 2200 mAh Gens Ace NiMH Battery Tests

6, Dec 2013

1-2v-aa-2200-mah-gens-ace-nimh-battery

The 1.2V AA 2200 mAh Gens Ace NiMH batteries we got here for testing are of the LSD (Low Self Discharge) type and offer a good balance in terms of capacity and price, not the highest one for LSD NiMH batteries, but also these come at a price of about half of that of the highest capacity LSD NiMH batteries out there. We’ve seen mostly good results from various Gens Ace LiPo batteries so far, and now it is time to see how well they are doing with NiMH batteries. Unfortunately they offer only AA size NiMH batteries, the ones tested here, so there are no other options currently available for example AAA or 9V. These Gens Ace batteries are rated as 2200 mAh, but there is no information about typical and minimum guaranteed capacity, though the suppose that they are 2200 mAh typical and 2100 mAh minimum capacity.


1-2v-aa-2200-mah-gens-ace-nimh-battery-capacity

Starting the tests of the 1.2V AA 2200 mAh Gens Ace NiMH batteries with a low constant current discharge rate of 0.2A got us 2098 mAh as useable capacity or with other words pretty much what their supposed minimum capacity should be. Just in case we have repeated the test with multiple different batteries and all of them ended up at about 2100 mAh useable capacity – still a good, but not a great result. Increasing the constant current load to 0.5A and 1.0A we still got very good results with useable capacity that is very close and even at 2.0A the Gens Ace battery still manages to provide a lot of capacity. The results, although slightly disappointing in terms of maximum useable capacity at low loads (we expected a bit more from Gens Ace), still show very good performance for both low and high load applications. And thanks to the good price these batteries may be a suitable choice for people looking for good high capacity LSD NiMH batteries available at a more affordable price and not looking for the best and highest possible capacity models that do cost more and may not offer that much more in terms of performance.

The performance of the 1.2V AA 2200 mAh Gens Ace NiMH batteries in our tests:

– 2098 mAh at 0.2A load
– 1932 mAh at 0.5A load
– 1923 mAh at 1.0A load
– 1791 mAh at 2.0A load

– 2.598 Wh at 0.2A load
– 2.368 Wh at 0.5A load
– 2.231 Wh at 1.0A load
– 1.995 Wh at 2.0A load


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