1.2V AA 2000 mAh Sanyo Eneloop NiMH Battery Tests

22 Nov
2013

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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…


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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…



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