1.2V AAA 800 mAh Sanyo Eneloop NiMH Battery Tests

21 Nov
2013

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The 1.2V AAA 800 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 800 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 – definitely impressive. Another interesting fact about these AAA batteries is that on their package you can find a minimum rating of 750 mAh, but nothing about their typical capacity of 800 mAh written, though they are being sold as 800 mAh and 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 10-2012 and we have measured the initial available capacity between 526 and 532 mAh or pretty much within the 10% discharge for a bit over than a year since they are manufactured, and now for the other tests…


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Starting the tests of the 1.2V AAA 800 mAh Sanyo Eneloop batteries with a low constant current discharge rate of 0.1A got us 872 mAh as useable capacity or almost 10% more than the typical rating of the batteries, so a great result. at a constant current discharge rate of 0.2A the batteries still manage to provide 750 mAh or the minimum guaranteed capacity rating and going higher at 0.5A the result is still great in terms of available capacity. Going for 1.0A however shows that these batteries are not doing that good, so they are not that suitable for very high power applications. In fact Sanyo has another series of batteries called Eneloop XX that is designed to handle better higher loads than the standard Sanyo batteries that are optimized more for longer use with lower power requirements.

The performance of the 1.2V AAA 800 mAh Sanyo Eneloop batteries in our tests:

– 872 mAh at 0.1A load
– 750 mAh at 0.2A load
– 730 mAh at 0.5A load
– 390 mAh at 1.0A load

– 1.090 Wh at 0.1A load
– 0.907 Wh at 0.2A load
– 0.838 Wh at 0.5A load
– 0.402 Wh at 1.0A load

– Download the official 1.2V AAA 800 mAh Sanyo Eneloop NiMH battery datasheet…



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