Probably, there is no such person who would not know what AA batteries of size R6 look like, which we commonly call finger-type. They are used literally everywhere, ranging from wall clocks to pocket flashlights. It is hard to imagine how a player, a digital camera or a remote control from a DVD player would work without this most useful invention.
However, despite the fact that they have long and firmly entered our everyday life, not everyone knows what they are, how long they work, and when choosing, they are mainly oriented to the price. You can, of course, not bother and buy AA batteries, which can always be recharged. But why overpay if the device is rarely used and consumes a small amount of energy? Yes, and not every store has them, but it happens that you need to replace AA batteries urgently and you have to buy what is available. Consider in detail what they are and how they differ from each other.- Saline. The most short-lived with a short service life. They lose their charge quickly, and can be distinguished by the letter R, which is used when marking them.
- Alkaline (alkaline). On the case, they have the inscription Alkaline, in comparison with salt ones, are better in quality and have a longer service life. For marking of this type, the letters LR are used.
- Lithium Batteries AA of this type by the use of lithium able to maintain the maximum voltage at small sizes. They retain a charge for a very long time and are able to withstand significant temperature changes.
- Mercury. They include mercury oxide, where their name comes from. The dimensions of the batteries are quite large, as well as the shelf life. They are very rare and do not have much popularity.
The choice of a galvanic cell directly depends on the device where it is planned to be installed. According to their energy intensity, all devices can be divided into groups:
- . , ( ). , .
- – , .. .
- – , , . . 15-20 .
- Low consumption - remotes, watches, etc. In this case, you can safely use AA salt batteries, which are the cheapest. Their capacity will be quite enough for 1-1.5 years of work.
When choosing “finger-type” power supplies, you should also pay attention to the inscriptions and recommendations of manufacturers on the packaging, as well as the brand. Such brands as Varta, Duracell, Maxell, Energizer, have long earned the highest recognition and high authority. At the same time, the most affordable are Sony, GP, Panasonic, etc.Now, when buying, it will be very easy to make a choice and purchase those items that are most appropriate for your device.