Batteries are used today in many types of equipment. But they have one serious drawback - after a complete discharge they should only be thrown away. Trying to restore is not worth it, this is a dangerous business.
They are being replaced by rechargeable batteries. They are increasingly replacing conventional ones. A large number of these batteries are available on the market: rechargeable batteries Varta, Bosch and others.
We will consider finger and little finger. According to the manufacturing method, they are divided into two types: nickel metal hydride and nickel cadmium. The former have a larger capacity. Capacity is a certain amount of energy that a battery can store and store in itself. Cadmium ones have a pronounced memory effect, and this is their drawback.The inability of the charging element to fully gain the required capacity, if it had not been completely discharged before, is called the memory effect.
At first use, it must be fully charged and subsequently completely de-energized.
Nickel metal hydride rechargeable batteries do not have a memory effect and have a higher capacity than nickel cadmium. Such batteries charge much longer. When used in the cold, their capacity is greatly reduced. Ni-Cd have no such drawback. They are not affected by operation at low temperatures. Ni-MH systems are able to charge as much as possible after several full charges and discharges.
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Today, a large number of “exercises” are presented on the market. Protozoa stand out for their low cost. The middle type already has some additional features. For example, many are equipped with a built-in timer that turns off the charging element after gaining full capacity. There are devices and the so-called comfort class. As a rule, they go on sale with power supplies. They charge batteries of any shape. They themselves can determine the type of charged element, calculate the capacity, determine the strength of the current, and after fully charging they themselves turn off. Devices of "luxury class" have a high cost, have the ability to connect to a computer, display all the data of the charged element on the display. They also have many other functions, the “turbo” mode will allow you to charge the batteries within 40 minutes.Using the sparing mode, you can give life to an already worn-out power supply (low current increases the time for supplying electricity, extends the life of the charged device).The best rechargeable batteries, perhaps those that have more capacity. Everyone can choose what he needs.