Posts Tagged ‘Powerex NiMH

1-2v-aa-2400-mah-powerex-imedion-nimh-battery

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.


1-2v-aa-2400-mah-powerex-imedion-nimh-battery-capacity

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

1-2v-aaa-950-mah-powerex-imedion-rechargeable-nimh-battery

The 1.2V AAA 950 mAh Powerex Imedion Rechargeable NiMH batteries are rechargeable batteries of the LSD type (Low Self Discharge) that are rated to retain up to 85% of their charge after 1 year of storage, unlike traditional NiMH batteries that will probably be completely discharged when stored for such a long period of time. The initial discharge capacity we got from these batteries was between 706 and 714 mAh with a low discharge current. Powerex is a brand of Maha Energy Corporation and is a well known brand among professional photographers for good quality batteries that are usually rated among the best and the same goes about the range of battery chargers that the company also makes. In fact we are using a MAHA Powerex C-9000 WizardOne Charger Analyzer as a part of our battery testing setup as we consider this to be one of the best AA/AAA battery chargers out there, so we do have very high expectations from these batteries.


1-2v-aaa-950-mah-powerex-imedion-rechargeable-nimh-battery-capacity

We have started the test of the 1.2V AAA 950 mAh Powerex Imedion Rechargeable NiMH batteries as we normally do with a low constant current discharge rate of 0.1A and the result we got was 1062 mAh, or with a bit more than 100 mAh than the rated capacity. The great performance continues even after increasing the load all the way up to 1.0A where we still get 800 mAh as a useable capacity. As we expected the 1.2V AAA 950 mAh Powerex Imedion Rechargeable NiMH batteries do perform great by providing higher capacity than they are rated at and they manage to handle well in both low and high load applications.

The performance of the 1.2V AAA 950 mAh Powerex Imedion Rechargeable NiMH Batteries in our tests:

– 1062 mAh at 0.1A load
– 988 mAh at 0.2A load
– 877 mAh at 0.5A load
– 800 mAh at 1.0A load

– 1.325 Wh at 0.1A load
– 1.222 Wh at 0.2A load
– 1.057 Wh at 0.5A load
– 0.910 Wh at 1.0A load


top