You have probably noticed that on most cables for charging your phone, tablet or any other device there is such an indicator as 2A, 3A, 5A (current). What does this mean? And how do you know if the cable really supports a given current without loss.
We manufacture cables in our small factory in Russia. And like any manufacturer, we take care to produce a product that meets the declared characteristics. If it is written on the cable that it supports a current of 2 Amperes (2A), then it must necessarily correspond to this.
Why do you need fast charging? The fact is that every year, phone manufacturers equip their devices with more and more capacious batteries. This is necessary so that users charge their phone as little as possible during the day. And of course, the larger the battery, the longer it takes to charge it. For this, they came up with special high-power adapters and, accordingly, cables that support high power.
So, what does this inscription 2A mean. Let’s start with the fact that any device is charged from a network adapter (in the people, network charging is just a charger or a plug). And in order for the adapter to transmit all the power to charge the battery of your device, you need a suitable cable.
The cable, as we all know, consists of several stranded wires. Current flows through these wires, which charges the battery of your device. If a strong current is run through a thin wire, then it simply simply cannot cope with it and starts to warm up. For example, your phone asks the power adapter to supply 10 watts (5V * 2A = 10W) of power to charge the battery, and a thin wire is designed for a maximum of 5 watts, then the wire will heat up and as it heats up, the power will drop. A wire with a small cross section (thin) is not able to physically pass a large current.
Why is this happening? The thing is that those same 2A or 3A depend on the cross section or, more simply, the thickness of the wire. The larger the cross section, the more current can pass through the wire. This can be compared to a highway, if the road has 4 lanes instead of 2, then it will let through 2 times more cars.
Then the question arises, the thicker the cable — the better it is? Not certainly in that way. The fact is that some manufacturers use a thin wire (small cross-section of cores) and a thick sheath (insulation — the outer sheath of the cable) in order to make the cable seem thicker, thereby confusing the buyer. How then to know how good the cable is?
Unfortunately, it is impossible to determine with improvised means how many maximum Amperes the cable will pass through. The only way is to time your device charging from 0% to 100%.
If you would like to purchase cables that guaranteed support fast charging, below we will mark 3 articles by which you can find them on WILDBERRIES. Just type the numbers into the search bar:
17913868 — USB cable — Type C
17913858 — Lightning cable for iPhones (and other Apple devices)
17913863 — USB to Micro USB cable
In the next article, we will tell you which cables are really fast charging and how much they cost.