Posts Tagged ‘aa


The 1.5V AA Toshiba Super Heavy Duty batteries are of the Carbon Zinc type, however this is not mentioned anywhere on the battery itself and this along with the fact that the batteries are labeled as Super Heavy Duty gives out the fact that they are indeed Carbon Zinc. This simply means that the 1.5V AA Toshiba Super Heavy Duty batteries that we test here with an expiration date of 04-2016 are not going to provide as much capacity as an Alkaline battery. We are not very happy when we find a Carbon Zinc battery that is not clearly labeled as such as that may be misleading the buyer, especially if not careful enough. As a general rule of thumb Alkaline batteries should have Alkaline written on them as opposed to Carbon Zinc batteries do not have that clearly stated.


Anyway, lets us see what we can expect in terms of performance from these Carbon Zinc batteries from Toshiba. Starting our tests of the 1.5V AA Toshiba Super Heavy Duty batteries with a constant current discharge rate of 0.1A we’ve managed to get 874 mAh capacity and that is actually not bad for a Carbon Zinc battery. Doubling the constant current discharge rate to 0.2A and the batteries still manage to handle pretty well, however by further increasing the load to the 1.5V AA Toshiba Super Heavy Duty Carbon Zinc batteries they are starting to offer significantly less capacity. This is to be expected as Carbon Zinc batteries are intended for use in cases where low power is required.

The performance of the 1.5V AA Toshiba Super Heavy Duty Batteries in our tests:

– 874 mAh at 0.1A load
– 661 mAh at 0.2A load
– 298 mAh at 0.5A load
– 45 mAh at 1.0A load

– 1.065 Wh at 0.1A load
– 0.773 Wh at 0.2A load
– 0.317 Wh at 0.5A load
– 0.046 Wh at 1.0A load


The 1.5V AA Varta High Energy Alkaline batteries are a slightly improved version of the Varta Simply Alkaline batteries and according the the manufacturer these should be able to provide 23% more power than the normal Varta Alkaline batteries. The batteries we have tested here have an expiration date of 06-2016, so they should be with a 5 year shelf life as they appear to have been produced in 07-2011. Varta does not provide detailed specifications about these batteries, but the company recommend their use for power-hungry devices, e.g. computer devices, audio equipments, toys etc. So lets us see how good these batteries perform in our tests.


Starting the tests of the 1.5V AA Varta High Energy Alkaline batteries with a constant current discharge rate of 0.1A we were very pleasantly surprised by the result we got – 2700 mAh capacity or with other words one of the best performing 1.5V AA-size Alkaline batteries we’ve tested so far with low current constant load. Moving to higher constant current loads these Varta batteries still perform great outperforming for example the standard Duracell Copper Top batteries by a bit and these are not the “toughest” Alkaline batteries from Varta. Compared to the Duracell Procell batteries however the 1.5V AA Varta High Energy Alkaline batteries only manage to provide slightly more capacity at 0.1A constant current load, but at higher loads the Procell performs better. Anyway, we are seeing a really great performance from these Varta batteries.

The performance of the 1.5V AA Varta High Energy Alkaline Batteries in our tests:

– 2700 mAh at 0.1A load
– 1941 mAh at 0.2A load
– 1216 mAh at 0.5A load
– 537 mAh at 1.0A load

– 3.332 Wh at 0.1A load
– 2.327 Wh at 0.2A load
– 1.371 Wh at 0.5A load
– 0.589 Wh at 1.0A load


The 1.5V AA Maxell Zinc batteries as their name suggests are Zinc Carbon batteries and here Maxell is not trying to cover this fact as some other manufacturers do by not clearly writing the type of their battery. The batteries we’ve tested here were labeled with an expiration date of 09-2015 and they are supposed to have a 3 years shelf life as most Carbon Zinc batteries do. The importance of saying clearly that a primary (single use non-rechargeable) battery is a Zinc Carbon one and not Alkaline is important as these batteries usually provide less capacity and are with expiration dates sooner than an Alkaline and although a bit cheaper unless for some low power applications you better go for Alkaline and not Zinc Carbon.


We started the tests of the 1.5V AA Maxell Zinc batteries with a constant current discharge rate of 0.1A and they were able to provide us with 649 mAh and while this is not bad for a Zinc Carbon battery you can get much more from an Alkaline battery. Increasing the constant current load the Maxell Zinc batteries do provide lower capacity, but they can handle decently at up to about 0.5A, going for a 1 Amp seems to be a bit too much for them as they very quickly hit the cutoff voltage.

The performance of the 1.5V AA Maxell Zinc Batteries in our tests:

– 649 mAh at 0.1A load
– 499 mAh at 0.2A load
– 236 mAh at 0.5A load
– 25 mAh at 1.0A load

– 0.786 Wh at 0.1A load
– 0.584 Wh at 0.2A load
– 0.253 Wh at 0.5A load
– 0.030 Wh at 1.0A load