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Archive for the ‘Alkaline Batteries’ Category
1.5V AA Varta High Energy Alkaline Battery Tests
22, Aug 2013
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
1.5V AA Maxell Carbon Zinc Battery Tests
21, Aug 2013
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
9V Sony Ultra Super Carbon Zinc Battery Tests
17, Aug 2013
The 9V Sony Ultra Super Carbon Zinc batteries we test here are rated with up to 3 years shelf life and are marked for use up to 11-2015. The Sony website does not have detailed specifications about these batteries, so we have to check them out by testing the actual capacity we can get out of these. Considering the fact that we are talking about a Carbon Zinc battery we don’t have very high expectations, even though Sony labels these batteries as Ultra Super.
To test the capacity that 9V Carbon Zinc batteries can provide we are using a constant current discharge test with 0.05A load (50 miliampers) due to the fact that the total capacity of these batteries is not that high and they are not intended for use in situations where high current loads can be expected. The 9V Sony Ultra Super Carbon Zinc battery we have tested here managed to provide 151 mAh capacity before hitting the 5.4V cutoff voltage and that is actually quite normal performance for a 9V Carbon Zinc battery as these usually provide less capacity than Alkaline batteries and are a bit cheaper compared to Alkaline.
The performance of the 9V Sony Ultra Super Carbon Zinc Batteries in our tests:
– 151 mAh at 0.05A load
– 0.998 Wh at 0.05A load