Posts Tagged ‘aa


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.


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


The 1.5V AA Toshiba E-Power batteries are Carbon-Zinc primary batteries and are the third model in Toshiba’s line of such batteries. According to the manufacturer these batteries are supposed to provide 25% improved performance vs Heavy Duty line and while we still haven’t tested the standard 1.5V AA Toshiba Heavy Duty batteries, we have tested the Super Heavy Duty model, so we could compare these to the E-Power series of Carbon-Zinc products. Just a reminder, the Zinc batteries do offer shorter shelf life and lower capacity and are not suitable for high load applications as compared to the Alkaline primary batteries. The Toshiba E-Power batteries we tested here were with an expiration date 05-2015.


Time for the tests to start for the 1.5V AA Toshiba E-Power batteries beginning with a low constant current discharge rate of 0.1A and the result we got was 731 mAh as capacity. This is a decent result for a Carbon-Zinc batteries, but compared to the Toshiba Super Heavy Duty batteries the E-Power does provide less useable capacity. Increasing the load to 0.2A and the E-Power still does pretty good, though at 0.5A the performance is not that good already and 1.0A proves to be too much. As expected these batteries do perform well, but are nothing special even for Zinc batteries. They are suitable for low load applications, but not for high load ones where you should definitely consider either good Alkaline batteries or even NiMH batteries.

The performance of the 1.5V AA Toshiba E-Power batteries in our tests:

– 731 mAh at 0.1A load
– 516 mAh at 0.2A load
– 199 mAh at 0.5A load
– 36 mAh at 1.0A load

– 0.874 Wh at 0.1A load
– 0.589 Wh at 0.2A load
– 0.207 Wh at 0.5A load
– 0.036 Wh at 1.0A load


The 1.2V AA 2400 mAh Powerex Imedion NiMH batteries are of the Low Self Discharge Type (LSD NiMH) and are considered to be among the best high capacity and high performance LSD NiMH batteries by many, competing with the like of Sanyo Eneloop for example. These batteries are rated at 2400 mAh typical and 2250 mAh minimum guaranteed capacity and the fact that they are LSD means they are supposed to loose not more than 15% of their capacity per year of storage. They also come pre-charged and can be recharged up to 1000 times. But let us see how good will they perform in our tests and see if they will manage to hold up to their reputation well or not.


Starting the tests of the 1.2V AA 2400 mAh Powerex Imedion NiMH batteries with a low constant current discharge rate of 0.2A got us 2414 mAh as or with other words we are getting a bit over the typical capacity that they are rated at, so a good start. Increasing the load to 0.5A these batteries still manage to provide capacity higher than their minimum rating of 2250 mAh, so more good results here. And going with even higher constant current loads of 1.0A and 2.0A we are still seeing very good results in terms of useable capacity. So in short, meeting their rating and providing more than good results in both low and high load applications and while not as good as Sanyo Eneloop XX in terms of capacity they are also a bit cheaper than the Eneloops. Anyway, these batteries are very good for what they are rated at and for their price, so you cannot go wrong getting them.

The performance of the 1.2V AA 2400 mAh Powerex Imedion NiMH batteries in our tests:

– 2414 mAh at 0.2A load
– 2283 mAh at 0.5A load
– 2168 mAh at 1.0A load
– 1917 mAh at 2.0A load

– 3.002 Wh at 0.2A load
– 2.781 Wh at 0.5A load
– 2.535 Wh at 1.0A load
– 2.099 Wh at 2.0A load