Archive for the ‘NiCd/NiMH Batteries’ Category

1.2V AAA 800 mAh Energizer Accu Recharge Extreme NiMH Battery Tests

3, Apr 2019

An interesting product from Energizer in the form of rechargeable AAA NiMH batteries that is apparently made wit 4% recycled batteries and that is a world’s first according to Energizer. The 1.2V AAA 800 mAh Energizer Accu Recharge Extreme NiMH come pre-charged and are of the low self discharge with charge lasting up to 12 months in storage. Marketing aside these do seem to be quite good for a mid-range in terms of capacity where higher current may be required and not so favorable temperature conditions are present.


The 1.2V AAA 800 mAh Energizer Accu Recharge Extreme NiMH batteries do manage to show pretty good results in our tests, though at 0.1A (our lowest constant current test setting) they fall somewhat short of the 800 mAh rating. Looking at the numbers and the discharge curves however you can see that increasing the discharge load all the way up to 1.0A the drop in the available capacity is relatively slow, so apparently these can handle higher current requirements pretty well indeed.

The performance of the 1.2V AAA 800 mAh Energizer Accu Recharge Extreme NiMH batteries in our tests:

– 732 mAh at 0.1A load
– 719 mAh at 0.2A load
– 713 mAh at 0.5A load
– 684 mAh at 1.0A load

– 0.931 Wh at 0.1A load
– 0.905 Wh at 0.2A load
– 0.871 Wh at 0.5A load
– 0.805 Wh at 1.0A load

8.4V 170 mAh Duracell Recharge Ultra NiMH Battery Test

2, Apr 2019

We have picked up a 8.4V Duracell Recharge Ultra NiMH battery rated at 170 mAh capacity to test out and compare with other batteries of this type we have already tested. The 8.4V NiMH category is still not well represented in our tests, so we are trying to fix that by adding more batteries to test, but it will take some more time. The 170 mAh capacity is lower than anything we have tested so far, there are alternatives available with higher capacity available on the market than what Duracell is offering with this product.


We are doing our regular 0.05A constant current discharge test for this type of batteries with a cut-off voltage set a 7V to check the usable capacity in mAh and Wh that the 8.4V 170 mAh Duracell Recharge Ultra NiMH battery can actually deliver. We got 158 mAh as usable capacity in our tests and while it is a bit short of the rated capacity it is not that bad, the result however shows that this particular battery might not do that well when used in more power demanding applications.

The performance of the 8.4V 170 mAh Duracell Recharge Ultra NiMH Batteries in our tests:

– 158 mAh at 0.05A load

– 1.384 Wh at 0.05A load

– To check the technical specifications of the 8.4V 170 mAh Duracell Recharge Ultra battery…

1.2V AA 2500 mAh Panasonic Eneloop Pro NiMH Battery At 1.0-5.0A High Current Discharge

19, Mar 2019

The 1.2V AA 2500 mAh Panasonic Eneloop Pro NiMH batteries are one of the best rechargeable AA size batteries out there for more serious tasks including higher current loads and use in low temperatures. Normally in our tests of AA size NiMH batteries we test up to 2.0A discharge and that is already considered pretty high current load, but this time we are going higher for the Panasonic Eneloop Pro to see what you can get out of them at 1.0A, 2.0A, 3.0A, 4.0A and even 5.0A… and this is form a single battery, not from a pack of 4 for example. You can check our initial test of the 1.2V AA 2500 mAh Panasonic Eneloop Pro NiMH batteries where we tested at 0.2A, 0.5A, 1.0A and 2.0A – our usual settings. The graph below is for the higher discharge currents we tested at and you can also see the results in mAh and Wh after that…


It seems that 1.2V AA 2500 mAh Panasonic Eneloop Pro NiMH batteries manage to handle really well up to 4.0A constant current discharge, managing to provide a little over 1500 mAh capacity. Going for 5.0A however significantly reduces the usable capacity in a constant current discharge situation at ust a little over 112 mAh before reaching the 1V output voltage from the battery. Do note however that in a variable discharge load with peaks to 5.0A for example the situation should be much different, for example using these batteries in a flash for a digital camera. So if you need AA size rechargeable batteries that can really handle high discharge current loads, not only peaks, but constant ones, then you should definitely look for the

High Current Load of 1.2V AA 2500 mAh Panasonic Eneloop Pro NiMH batteries:

– 2388 mAh at 1.0A load
– 2322 mAh at 2.0A load
– 2064 mAh at 3.0A load
– 1527 mAh at 4.0A load
– 112 mAh at 5.0A load

– 2.870 Wh at 1.0A load
– 2.601 Wh at 2.0A load
– 2.224 Wh at 3.0A load
– 1.591 Wh at 4.0A load
– 0.116 Wh at 5.0A load


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