If u often has a situation when at the most inopportune moment the camera does not work, then it is time to replace the usual batteries with battery ones. It is a popular power source that is widely used in everyday life - in the remote control, wireless computer mouse, in the desktop clock and even in children's toys. The main difference from conventional batteries is the possibility of multiple charging. So, we will tell you about the peculiarities of rechargeable finger batteries, as well as the nuances of their choice.
What are they - rechargeable batteries?
If we talk about how to look battery batteries, then visually they differ little from conventional batteries. This is the same cylinder, whose diameter does not exceed 13.5 mm. To distinguish the batteries from the batteries will help inscription on the first "Rechargable", that is, "rechargeable". They are also labeled with AA, in contrast to the mini-finger batteries labeled AAA.
Nickel-Metal Hydride Rechargeable Batteries
Most often in stores you can find nickel-metal hydride batteries. Their main advantages are:
- low cost;
- lack of "memory effect";
- considerable capacity.
In this case, batteries of this type also have disadvantages, namely:
- the possibility of overheating when charging;
- sensitivity to high and low temperatures;
- the appearance of self-discharge.
Nickel-cadmium batteries
Another type of rechargeable finger batteries - nickel-cadmium batteries - is valued for:
- a large number of recharges (up to a thousand), provided that they are used correctly;
- the ability to use in all weather conditions;
- preservation of charge for a long time;
- low cost.
In this case, the batteries have, unfortunately, significant drawbacks:
- The most important is the so-called "memory effect". It often occurs if you repeatedly discharged the batteries to the middle, and then re-charged. As a result, it is usually very inadequate when the power source can falsely report its full discharge. That's why before charging them you must first completely discharge.
- Moreover, nickel-metal hydride finger batteries are capable of self-discharging, and they are afraid of recharging.
Lithium-ion batteries
Lithium-ion batteries are not at all subject to the "memory effect", they can be charged at any time. The merits of this type of battery can also include:
- absence of self-discharge;
- average recharge resource (500-700 times);
- a large indicator of capacity.
Unfortunately, there were some shortcomings. Lithium-ion batteries are very sensitive:
- to high temperatures;
- to voltage drops.
Cordless batteries - which are better?
A wide variety of rechargeable batteries sometimes makes choosing a power source difficult. If you need batteries for a device that you plan to use occasionally, from time to time, it is better to give preference to nickel-metal hydride batteries that do not sin with the "memory effect", and therefore do not need to be completely discharged. Recognize them is not difficult. The marking of these rechargeable finger batteries is Ni-MH . Accordingly, for often used equipment it makes sense to purchase lithium-ion or nickel-cadmium denoted as Li-ion, the second - Ni-Cd.
When choosing the right battery, pay attention to its capacity. The higher it is, the more, say, you can take photos. On sale there are variants from 650 to 2700 mA / h. Note at the same time that the higher the capacity, the longer the battery is charged. Speaking of the manufacturers, the products from Panasonic Eneloop, GP, Duracell, Varta, Energizer, Kodak, Sony and others are popular.