Most modern mobile devices are powered by batteries, for charging which the mains chargers are used. And although most gadgets come with a charger, it is not uncommon that you need to buy another charger: the original charger may get lost or broken, and some gadgets do not have a charger at all. However, whatever the reason you need a new wall charger, you should keep in mind that the "right" charger plug for your gadget is not enough. You should make sure that the other characteristics of the charger also meet the parameters. Characteristics of network chargers The plug connector is the first thing that determines the compatibility of the charger with the one being charged.
Fortunately, the days when each manufacturer provided its gadgets with a unique connector are slowly becoming a thing of the past, and most modern devices use a USB connector or its variants - mini USB, micro USB, USB Type-C.
Chargers for such gadgets, as a rule, have a USB connector and - if necessary - a removable cable in the kit, which is an adapter for other connectors of the same standard. Although there are chargers with micro USB or USB Type-C connectors on the body or on a fixed cable - but this does not give them any advantage, on the contrary, makes them less versatile. There are some chargers with multiple USB connectors - from two to eight. They can charge several devices at the same time, but keep in mind that the output current to the port in this case may be less than the total maximum output current.
If you connect two devices with the maximum output current of 1000 mA to the charger with this current, both devices will "get" only 500 mA (even if the output current per port is declared for the same 1000 mA) and will charge twice as long. The output current per port can be equal to the maximum only when only one device is connected to it, "taking" the maximum current. Of the other common connectors we can only mention the 8-pin Lightning, used on Apple mobile devices since 2012. If you want you can still find chargers for old gadgets - 20-pin connectors for Samsung smartphones, 30-pin connectors for Apple gadgets until 2012, 18-pin connectors for LG smartphones, and so on, but the choice is limited, and soon we should expect their complete disappearance from store shelves. There are also chargers with cylindrical plugs type DJK or jack, such power connectors are used in many different electrical equipment. The peculiarity of selecting such charger is that they have no common standard, each device using such plug can have different parameters of charging, which should be carefully observed. When purchasing a charger with such a connector, you should make sure that the pole location, amperage and voltage are exactly as specified in the user manual of the charger (or at least on its casing). Failure to do so may result in failure of both the charger and the gadget being charged. The current intensity of the charger with a lightning connector can be any - all Apple devices are equipped with a charge controller and simply will not take more current than necessary.
Another thing is that a current less than the device can consume will increase the charging time. And for example, the iPad mini of the 1 st generation charging with a current of 0.15 A can be charged from the charger with an output current of 2.4 A - this will not affect the charging process.
An ordinary iPad with a "phone" charger with an output current of 1 A will also charge - but twice as long as usual. Various Apple devices can be charged with currents ranging from 0.15 to 2.4 A. The same applies to chargers with a USB connector - the smartphone charge controller will protect your smartphone if it's plugged into a too powerful charger. In the opposite case - when you connect to a "weak" charger a device capable of charging with a high current - the charging time will increase.
Roughly speaking, both with Lightning port and USB port, it is better to take a charger for your smartphone with a current of at least 2A. Many modern smartphones can be charged with a current of 3A, and the larger gadgets easily "take" 4-5A. Most other devices charged by USB, also have a charging controller and are not "afraid" of high currents, but to be sure it is better to check the user manual and do not charge with a current higher than specified in it.
The voltages of the circular DJK or jack can be different and must meet the requirements of the device being charged. The Lightning and USB connectors, on the other hand, are more complicated. The standard voltage for these connectors is 5V. However, in intelligent fast charging modes, the voltage can go up to 20V. This happens automatically, without the user's involvement: the controller of the charging device, using the fast charging protocol, sets the desired mode on the charger. This allows reducing the charging time by several times and the manufacturers claim that such modes do not lead to