Posts Tagged ‘AAA Maxell’

1.2V AAA 840 mAh Maxell NiMH Battery Tests

16, Nov 2013

1-2v-aaa-840-mah-maxell-nimh-battery

The 1.2V AAA 840 mAh Maxell NiMH batteries are standard NiMH batteries and although their capacity rating may seem low at first there is something important that you should note about the rating. Most other NiMH battery manufacturers do list their product capacity ratings as typical values with large text and have a minimum value written somewhere with small text or not written at all. Unlike them Maxell has decided to list the minimum guaranteed capacity for their batteries as the actual battery capacity, so the 840 mAh rating here is the minimum guaranteed one, not the typical and there isn’t a typical rating written anywhere. So it will be quite interesting for us to see what is the actual performance of these Maxell AAA NiMH batteries in our tests…


1-2v-aaa-840-mah-maxell-nimh-battery-capacity

We have started the test of the 1.2V AAA 840 mAh Maxell NiMH batteries as we normally do with a low constant current discharge rate of 0.1A and the result we got was 1048 mAh as capacity, a surprisingly high result. We’ve seen other brand name AAA batteries rated at 1000 mAh to provide such capacities and these batteries form Maxell are rated as 840 mAh minimum capacity, so they are obviously able to provide significantly higher capacity as their typical rating. GOing with higher constant current load even at 0.5A these batteries still do manage to provide a bit over their rated minimum capacity and that is a great performance. We are really impressed with the results and Maxell could’ve easily rated these batteries with a typical capacity of 1000 mAh as they are clearly showing results similar to those of good quality 1000 mAh AAA NiMH products.

The performance of the 1.2V AAA 840 mAh Maxell NiMH batteries in our tests:

– 1048 mAh at 0.1A load
– 904 mAh at 0.2A load
– 848 mAh at 0.5A load
– 776 mAh at 1.0A load

– 1.309 Wh at 0.1A load
– 1.111 Wh at 0.2A load
– 1.012 Wh at 0.5A load
– 0.979 Wh at 1.0A load

1.5V AAA Maxell Super Alkaline Battery Tests

12, Sep 2013

1-5v-aaa-maxell-super-alkaline-battery

The 1.5V AAA Maxell Super Alkaline batteries are supposedly better than standard Alkaline batteries that Maxell makes and are intended for high-drain devices according to the company. The batteries we’ve had for testing were with an expiration date of 01-2017 meaning that the shelf life is at least 4 years, though we are not exactly sure when these batteries were produced so it might also be 5 years. Anyway, let us see how good these 1.5V AAA size Alkaline batteries from Maxell perform in terms of useable capacity in our tests…


1-5v-aaa-maxell-super-alkaline-battery-capacity

Starting our test of the 1.5V AAA Maxell Super Alkaline batteries as usual with a low constant current discharge rate of 0.1A we have managed to get 948 mAh as capacity and that is actually a very good result. Increasing the load to 0.2A and 0.3A the Maxell batteries do manage well, and even at 0.5A the useable capacity was still quite decent. In overall these Alkaline batteries seem to be doing quite well, but do not provide as much capacity as an Alkaline Duracell battery of the same type for example does (we use Duracell as a reference), so there is more to be desired.

The performance of the 1.5V AAA Maxell Super Alkaline batteries in our tests:

– 948 mAh at 0.1A load
– 572 mAh at 0.2A load
– 474 mAh at 0.3A load
– 253 mAh at 0.5A load

– 1.135 Wh at 0.1A load
– 0.675 Wh at 0.2A load
– 0.552 Wh at 0.3A load
– 0.282 Wh at 0.5A load


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