Posts Tagged ‘Maxell Batteries

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

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

1-2v-aa-2300-mah-maxell-rechargeable-nimh-battery

The 1.2V AA 2300 mAh Maxell Rechargeable NiMH batteries we got for testing here are rated as 2300 mAh minimum capacity and that is the number printed on their package and this kind of surprised us as usually NiMH battery manufacturers print with big numbers on the front the typical capacity and somewhere else with small letters the minimum capacity that their cells should provide. The 2300 NiMHs we’ve got for testing apparently are now being replaced with a newer model that offers 2500 mAh capacity, though as it was not yet available in the shop we got these from we got only the 2300 mAh version.


1-2v-aa-2300-mah-maxell-rechargeable-nimh-battery-capacity

We have started the test of the 1.2V AA 2300 mAh Maxell Rechargeable NiMH batteries with a low constant current discharge rate of 0.2A (the lowest load for AA NiMHs in our tests) and the result we got was 2328 mAh capacity. This value is well within the minimum capacity rating for the batteries, so we can say these Maxell NiMHs perform very well and furthermore increasing the load to 0.5A and 1.0A the batteries not only manage to still provide very good level of capacity, but the difference is actually quite small between the two and even at 2.0A load we still get good capacity. So the 1.2V AA 2300 mAh Maxell Rechargeable NiMH batteries do manage to perform very well not only in lower load applications, but in a very high ones as well by providing good capacity in various applications requiring more power.

The performance of the 1.2V AA 2300 mAh Maxell Rechargeable NiMH Batteries in our tests:

– 2328 mAh at 0.2A load
– 2182 mAh at 0.5A load
– 2156 mAh at 1.0A load
– 1547 mAh at 2.0A load

– 2.902 Wh at 0.2A load
– 2.640 Wh at 0.5A load
– 2.469 Wh at 1.0A load
– 1.598 Wh at 2.0A load


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