Posts Tagged ‘8.4V NiMH battery’

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…

8.4V 200 mAh Uniross NiMH Battery Tests

20, Nov 2013

8-4v-200-mah-uniross-nimh-battery

The 8.4V 200 mAh Uniross NiMH batteries we are testing here are traditional rechargeable NiMHs and though they are labeled as 9V, they are consist essentially of 7 NiMH cells of 1.2V each, so they are more like 8.4V and not the same as 9V alkaline, but some battery manufacturers prefer to label their 8.4V NiMH products as 9V for the the consumer to easily associate them as a rechargeable alternative to the 9V Alkaline batteries and Uniross is apparently one of those battery makers.


8-4v-200-mah-uniross-nimh-battery-capacity

In order to test the capacity of the 8.4V 200 mAh Uniross NiMH batteries we are using a constant current discharge rate of 0.05A (50 miliampers) and we have managed to get 217 mAh and that is a bit over the rating of these batteries, so it seems that Uniross has done a good job with these. The only drawback is that the capacity of the battery is a bit on the lower end of the capacity offered by 8.4V products and that along with the fact that this is not an LSD battery makes is a bit of a problem if you want to get longer operation time when using this battery in a low power device.

The performance of the 8.4V 200 mAh Uniross NiMH Batteries in our tests:

– 217 mAh at 0.05A load

– 1.887 Wh at 0.05A load

8.4V 280 mAh Fujicell NiMH Battery Tests

19, Nov 2013

8-4v-280-mah-fujicell-nimh-battery

The 8.4V 280 mAh Fujicell NiMH batteries we are testing here are from the traditional type of rechargeable Nickel Metal Hydride batteries and they come with a pretty high capacity for their type of 280 mAh, so we would be interested to see if they can actually deliver it. Fujicell rates these batteries as being capable of being recharged up to 1000 times, so they should be able to serve you for pretty long time considering that this type of batteries is often used for low power applications.


8-4v-280-mah-fujicell-nimh-battery-capacity

In order to test the capacity of the 8.4V 280 mAh Fujicell NiMH batteries we are using a constant current discharge rate of 0.05A (50 miliampers) and we have managed to get 285 mAh capacity before hitting the 7V cutoff voltage and that is actually a bit over manufacturer’s rating for this battery that is 280 mAh. So we cans ay that with this battery Fujicell has done a good job and they manage to deliver what they have promised as capacity, now if only the battery was also a low self discharge type NiMH, but nevertheless a good product from Fujicell.

The performance of the 8.4V 280 mAh Fujicell NiMH Batteries in our tests:

– 285 mAh at 0.05A load

– 2.486 Wh at 0.05A load


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