Technology in the modern world seeks to minimize and eliminate wires. This leads to the fact that in recent years more and more various devices and devices have appeared, for the supply of which AAA batteries are used. Such devices are in the house of almost every one of us. These are wireless mice, shaving machines, TV and DVD control panels, pocket recorders, audio players, etc.
Because of their small size, AAA batteries are often called “little fingers” or “mini-fingers”. The following designations can also be used to mark batteries of this type: LR3, R3, LR03 (IEC) and R03. When choosing a
galvanic cell for your gadget, you must first pay attention to the type of electrolyte used, since this affects the capacity, duration of operation and the possibility of recharging.
Depending on their composition, ordinary AAA batteries are divided into salt, alkaline (alkaline) and lithium.
Power sources that use salt electrolyte are designed for low load and are used, as a rule, in watches, electronic thermometers and remote controls. They are the cheapest and short-lived. They can be distinguished from another type by the absence of the prefix L in the marking, for example R3, R6, and low cost (as mentioned above).
Alkaline (alkaline) AAA batteries occupy an intermediate position. They use potassium hydroxide as an electrolyte and this is the main difference from salt elements. Chemical reactions in such sources occur at a faster rate. This contributes to a better current output. They last longer and are suitable for equipment with an average level of energy consumption: audio players, PDAs, radios, etc. They can be distinguished from another species by the word "alkaline" and the presence of the letter L in the marking.
“AAA” type lithium batteries are considered the best. They have the smallest internal resistance and the longest service life. They are advantageous to use in devices with intensive energy consumption: toys, LED lights, etc.
If the device is used often enough, “AAA” batteries will be an excellent alternative to “mini-finger” alkaline and lithium cells. Using a charger such sources can be recharged on average about a thousand times. Battery capacity is usually indicated in ampere hours. The following types of elements have gained distribution today:
- Li-pol (lithium polymer);
- Li-pol (lithium-ion);
- NiMH (nickel metal hydride);
- NiCd (nickel cadmium).
Each of them has its own characteristics. So, NiMH batteries are very sensitive to overcharging, and lithium batteries also depend on voltage and temperature. Sources such as NiMH and NiCd have the so-called "memory effect", which is to reduce the capacity when charging a battery that is not fully discharged. In addition, these two types are characterized by noticeable self-discharge, that is, loss of charge even in the event of a downtime when the device is turned off. Cadmium batteries, although they have low power consumption, can withstand frosts and can withstand even
short circuits.Therefore, the choice of "AAA" type of power supply depends entirely on the device in which it will be used, and the conditions for future work. Also when buying an item you need to pay attention to the brand and expiration date.