When choosing a battery, there are some very important aspects that should be taken into account, otherwise the device in which you put the battery will not work, or it may even burn out, so it does not hurt to go over what to pay attention to when choosing the right battery before buying. during, make sure you don't touch it!
One of the most important aspects is the size, that is, to choose a battery of the size that the manufacturer recommends for the given device, because if you buy a smaller or larger one, it will not fit, it will not reach the poles or it will rattle, so if it is written, if, for example, you need an 18650, then buy one, neither smaller nor larger. What else should we pay attention to in order to choose the right battery???
Grouping by size
Among the Li-ion cells, the 18650 battery can be used most often, but the 14500 and 26650 batteries are also common, and 10440, 16340, 18350, 18500, 32650 batteries are also available. in fact, lately the 20700, but especially the 21700, are starting to spread (the spread of the latter is greatly supported by the fact that many electric bicycles have batteries of this size, moreover, the batteries of Tesla cars also consist of batteries of this size, of course not a few) . In practice, these numbers cover the size of the battery, for example, if we look at the 18650, the first two characters indicate the diameter of the cell, in our case 18 mm, and the second two characters indicate the length of the cell, which is 65 mm. To make life not so easy, the size of some batteries can differ by a few mm from this, so even if they are 18650, they can still be 18.5 mm wide and even 70 mm long, especially if they are protected (more on this later word, what it means), so it is worth clarifying which battery fits in which device you want to use before ordering.
Grouping according to voltage
Nickel-based batteries have a nominal voltage of 1.2 V, which in practice means that they operate between 0.8-1.4 V.
Lithium-based batteries, but with an operating voltage of 1.5 V, they were created to replace the previous group, they operate between 1-1.8 V
Lithium-ion with a voltage of 3.0 V (typically in CR2 and CR123 sizes)
LifePO4 batteries with 3.2 V voltage
Li-ion with a voltage of 3.6 V (between 2.8 and 4.2 V)
They are not interchangeable, so don't put a 3.6V battery in a device that expects a 1.2V device, because it will end badly. 1.5 V batteries easily destroy a conventional 1.2 V charger. But you can, for example, put a 3.0 V battery into a charger that is rated for 3.2 V, but a bigger difference is no longer a reason.
Grouping by material
Currently, there are two main types of batteries on the market, nickel-based (1.2 V) and lithium-based. (3.7V)
Li-ion
Currently, Lithium-Ion batteries are the most common (we also mainly sell them), for several reasons:
- batteries made of lithium are much lighter and more durable than nickel-based batteries
- No memory effect
- It slowly loses its charge
- Even an exhausted cell can supply at least 2.8 V compared to 1-1.25 V NiCd or NiMH batteries, although it is not good to dip it below 3 V, because it is at the expense of the service life, in fact, not all charger can breathe life into them
- On the other hand: unprotected models are more sensitive, they can be overcharged, which destroys the battery, and a short-circuited battery can be dangerous, so it is only worth buying a quality battery and charger from a reliable place
