Posts Tagged ‘1.2V NiMH battery

1-2v-aaa-850-mah-hama-nimh-battery

The 1.2V AAA 850 mAh Hama Ready for Power NiMH batteries are rechargeable batteries of the LSD type (Low Self Discharge) – batteries that come pre-charged and ready to be used and that retain most of their capacity over longer periods of time unlike the standard NiMH batteries that lose their charge at a faster rate. Hama is an European brand that is known for various computer and not only computer accessories and they often have interesting products at good prices, so let us see if these batteries are such a product or not…


1-2v-aaa-850-mah-hama-nimh-battery-capacity

We have started the test of the 1.2V AAA 850 mAh Hama Ready for Power NiMH batteries as we normally do with a low constant current discharge rate of 0.1A and the result we got was 992 mAh, a surprisingly good result from a battery rated at 850 mAh. Increasing the constant current load to 0.2A these batteries still manage to provide more than their rated capacity, and going for 0.5A load they fall just a bit below their rated capacity. Even with a 1.0A constant current discharge load we got surprisingly high useable capacity, meaning that Hama did really well with this product and it not only meets the ratings, but surpasses them quite a lot. The batteries handle very well not only with a low current load, but with a high loads as well, making them suitable for all applications. the good useable capacity under low and high loads, together with the low self discharge capabilities makes these rechargeable Hama batteries a good choice for various needs.

The performance of the 1.2V AAA 850 mAh Hama Ready for Power NiMH Batteries in our tests:

– 992 mAh at 0.1A load
– 897 mAh at 0.2A load
– 843 mAh at 0.5A load
– 766 mAh at 1.0A load

– 1.239 Wh at 0.1A load
– 1.103 Wh at 0.2A load
– 1.000 Wh at 0.5A load
– 0.852 Wh at 1.0A load

1-2v-aa-2700-mah-gp-rechargeable-nimh-battery

The 1.2V AA 2700 mAh GP NiMH batteries are the largest capacity NiMHs offered by the company and we are expecting to see good results from them. With GP’s batteries we’ve seen quite interesting results in our tests, some models are a bit disappointing, others are surprisingly good, but since we’ve seen varying results with the highest capacity NiMH batteries from different brands we are hoping that GP did not make any compromise with their top model at least.


1-2v-aa-2700-mah-gp-rechargeable-nimh-battery-capacity

Starting the test of the 1.2V AA 2700 mAh GP NiMH batteries as we normally do with a low constant current discharge rate of 0.2A and the result was 2664 mAh as capacity which is great result for a battery rated at 2700 mAh (typical capacity), we can say that it is perfect. Furthermore increasing the constant current discharge rate at up to 2.0A the batteries continue to perform great offering great useable capacity levels. We can say for sure that the 1.2V AA 2700 mAh GP NiMH Rechargeable batteries are really good choice and are true to their ratings, unlike the not so well performing 2500 mAh model that we’ve tested some time ago that got us a bit disappointed.

The performance of the 1.2V AA 2700 mAh GP NiMH Batteries in our tests:

– 2664 mAh at 0.2A load
– 2527 mAh at 0.5A load
– 2404 mAh at 1.0A load
– 2223 mAh at 2.0A load

– 3.329 Wh at 0.2A load
– 3.082 Wh at 0.5A load
– 2.801 Wh at 1.0A load
– 2.436 Wh at 2.0A load

1-2v-aa-2700-mah-xcell-nimh-battery

The 1.2V AA 2700 mAh Xcell NiMH batteries seem to offer a large capacity at a first glance, but we need to check if you actually get that much as hitting levels of 2700 mAh and being able to actually provide them in real conditions is something that the top battery brands are still struggling to do. Another thing to note with the higher capacity NiMH batteries is that they do have a faster initial self discharge, so they loose more of their capacity the first day they are charged than lower capacity NiMHs, unless they are from the LSD type. Anyway, lets us see what will these Xcell batteries be able to offer…


1-2v-aa-2700-mah-xcell-nimh-battery-capacity

We have started the test of the 1.2V AA 2700 mAh Xcell NiMH batteries as we normally do with a low constant current discharge rate of 0.2A and the result we got was 2191 mAh as capacity and that is way too little for a battery rated at 2700 mAh, disappointing us a bit. Going further by increasing the constant current load at up to 2.0A, these batteries do manage to provide good results, so they are handling well higher loads, it is just that the useable capacity you get is less than advertised. We’ve repeated the tests multiple times just to be sure that this is really the maximum we can get from the AA Xcell NiMH batteries and in the end we would recommend to choose different 2700 mAh batteries if you are in need of higher capacity.

The performance of the 1.2V AA 2700 mAh Xcell NiMH Batteries in our tests:

– 2191 mAh at 0.2A load
– 1885 mAh at 0.5A load
– 1714 mAh at 1.0A load
– 1650 mAh at 2.0A load

– 2.758 Wh at 0.2A load
– 2.329 Wh at 0.5A load
– 2.029 Wh at 1.0A load
– 1.816 Wh at 2.0A load


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