Posts Tagged ‘AA battery

1-2v-aa-2000-mah-sanyo-eneloop-nimh-battery

The 1.2V AA 2000 mAh Sanyo Eneloop batteries are of the third generation of Eneloop batteries from Sanyo and offer some really impressive features making the competition seem inferior in all aspects besides the capacity, even though 2000 mAh is still a good rating for an LSD (low self discharge) NiMH battery. Sanyo claims that these Eneloop batteries are capable of being recharged up to 1800 times and that they are able to retain 90% of their capacity if only stored and not being used and up to 70% of their charge after 5 years of storage. Another interesting fact about these AA batteries is that on their package you can find only a minimum rating of 1900 mAh, but nothing about their typical capacity of 2000 mAh written, though that information is available on Sanyo’s website. These batteries are supposed to come pre-charged at 75% of their capacity and ready to be used, the ones we tested were manufactured in 11-2012 and we have measured the initial available capacity between 1410 and 1420 mAh or pretty much within the 10% (a bit less actually) discharge for about a year since they were manufactured. And now it is time to move to the other tests…


1-2v-aa-2000-mah-sanyo-eneloop-nimh-battery-capacity

Starting the tests of the 1.2V AA 2000 mAh Sanyo Eneloop batteries with a low constant current discharge rate of 0.2A got us 1927 mAh as useable capacity or withing the range between the minimum guaranteed and the typical rating of the batteries. Increasing the constant current discharge rate from that point on gives really impressive results in terms of useable capacity and even at 2.0A the result is very good, though for applications requiring such higher power requirements you might want to consider going for the Eneloop XX batteries instead as Sanyo has designed them especially for higher load applications. In overall great performance from the 1.2V AA 2000 mAh Sanyo Eneloop NiMH batteries as we expected, so next up for testing come the Eneloop XX LSD NiMH batteries.

The performance of the 1.2V AA 2000 mAh Sanyo Eneloop batteries in our tests:

– 1927 mAh at 0.2A load
– 1841 mAh at 0.5A load
– 1701 mAh at 1.0A load
– 1588 mAh at 2.0A load

– 2.423 Wh at 0.2A load
– 2.264 Wh at 0.5A load
– 2.033 Wh at 1.0A load
– 1.774 Wh at 2.0A load

Download the official 1.2V AA 2000 mAh Sanyo Eneloop NiMH battery datasheet…

1-2v-aa-2800-mah-fujicell-nimh-battery

The 1.2V AA 2800 mAh Fujicell NiMH batteries we test here are of the standard NiMH type and are rated pretty high at 2800 mAh (the company also makes LSD NiMH batteries that we are soon also going to test), so we were quite interested to see how these perform, especially considering that they are available at a good price. Now, before moving on to the tests we should clear something important, as some people associate the brand Fujicell with Fujifilm (Fuji), even though both companies have nothing to do with each other. Fujicell is not associated with Fujifilm, although both companies are Japanese and apparently are taking advantage of the popular Japanese Mount Fuji.


1-2v-aa-2800-mah-fujicell-nimh-battery-capacity

We have started the test of the 1.2V AA 2800 mAh Fujicell NiMH batteries as we normally do with a low constant current discharge rate of 0.2A and the result we got was 2532 mAh as capacity and while this is a bit shorter from the 2800 mAh rating it is still quite good performance for not a very popular and well known brand of batteries. Increasing the constant current load going all the way up to 2.0A we still manage to get very decent performance, meaning that they can handle well both high and low load applications. If Fujicell has provided a minimum guaranteed capacity rating of 2500 mAh for these batteries they would’ve met their specs, but now we can say that they fall short of the 2800 mAh rating by quite a bit and even the faster self discharge of higher capacity batteries is not a reason enough for such a difference.

The performance of the 1.2V AA 2800 mAh Fujicell NiMH batteries in our tests:

– 2532 mAh at 0.2A load
– 2384 mAh at 0.5A load
– 2263 mAh at 1.0A load
– 1804 mAh at 2.0A load

– 3.115 Wh at 0.2A load
– 2.881 Wh at 0.5A load
– 2.620 Wh at 1.0A load
– 1.925 Wh at 2.0A load

1-2v-aaa-900-mah-turnigy-lsd-nimh-battery

The 1.2V AAA 900 mAh Turnigy LSD NiMH batteries are Low Self Discharge NiMHs as the name suggests, meaning they do loose less of their useable capacity over time compared to traditional NiMH batteries. Turnigy is a brand of one of the largest online RC model stores, namely Hobby King, so these batteries are often used for radio controlled models – for powering transmitters, receivers and even smaller scale models. The price of the Turnigy LSD NiMH batteries is more attractive compared to other similar products, but what about their performance, we are going to find out exactly that now.


1-2v-aaa-900-mah-turnigy-lsd-nimh-battery-capacity

We have started the test of the 1.2V AAA 900 mAh Turnigy LSD NiMH batteries as we normally do with a low constant current discharge rate of 0.1A and getting 1068 mAh as a useable capacity is really a good result with significantly higher capacity than what the batteries are rated. In fact the performance of the 900 mAh Turnigy LSD is very close to the one provided by the 950 mAh Powerex Imedion LSD NiMH batteries that we’ve tested recently that also performed great. Increasing the load we test at and we still got great performance out of the Turnigy batteries, so they are great and affordable solution and the only problem is that you can only order these online from some of Hobby King’s warehouses in different countries.

The performance of the 1.2V AAA 900 mAh Turnigy LSD NiMH batteries in our tests:

– 1068 mAh at 0.1A load
– 988 mAh at 0.2A load
– 909 mAh at 0.5A load
– 836 mAh at 1.0A load

– 1.318 Wh at 0.1A load
– 1.203 Wh at 0.2A load
– 1.076 Wh at 0.5A load
– 0.948 Wh at 1.0A load


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