An external battery for a smartphone or any other device is a very useful and always needed item. At any moment, we can find ourselves in a situation where we urgently need to recharge our devices, but there may not be an outlet at hand. It is in such cases that an external battery or power bank comes to the rescue. The main characteristic by which a power bank is chosen is capacity.
We decided to talk about how to choose the right device according to its characteristics.
Power banks range in size from pocket-size to quite large ones that can add up to a kilo to your bag. You can charge completely different devices with their help — not only smartphones, but also tablets, action cameras, speakers, cameras, and in some cases even laptops.
External battery capacity
In order to choose the right capacity, you need to make some simple calculations. First of all, you need to know exactly the model of the device or devices that you plan to charge most often. Knowing the model, you can easily see the battery capacity of the device in its characteristics. After that, you need to at least roughly calculate how many times you will need a charger on average. Some simple math will tell you what battery capacity you need to look for.
For example, iPhone smartphones have very small batteries — the iPhone X model has a 2716 mAh battery. The Samsung Galaxy S9 Plus has a higher figure, 3500 mAh. There are various smartphones with a capacity of 4000mAh, 5 and above.
In the case of the two flagship models, everything is quite simple, you can choose a battery with an average capacity of 10,000 mAh to charge them. They are small and will be able to charge the device several times, which is enough for most users.
Various types of power banks
Contrary to popular belief, external batteries are by no means limited to the only type of box with USB outputs familiar to us. Moreover, several types can be distinguished among them. One of the most convenient for a smartphone is a charging case. If you are not worried about the appearance of your device, then this is the perfect choice. Such covers, of course, make the smartphone a little heavier and larger, but it can also work longer than usual.
There are also special external batteries for laptops or combined for mobile devices and laptops. They differ in capacity and size.
And of course, the most familiar option for us is a portable charger that works with mobile devices.
How much does the power bank itself charge?
Of course, this depends primarily on the capacity of the device. However, you should immediately warn that such devices support fast charging for smartphones, but they themselves use the standard long charging process. A device with a capacity of 2000mAh will charge quickly, like a smartphone, but a 20000mAh battery can be charged for half a day. It is best to charge the batteries from the network, and not from the computer’s USB port, so the process will be faster and, as a result, more efficient.
External batteries run on lithium polymer (Li-Po) and lithium-ion (Li-Ion) batteries.
Depending on the specifics of the device and the chemical nuances in the design of the battery, a power bank can withstand from 200 to 1000 recharge cycles.
What is the best way to charge a smartphone and not waste the charge of a power bank?
Many people ask this question and quite rightly, because the energy of your portable battery is also not infinite. Smartphones tend to download apps while charging and generally run the same processes as they do the rest of the time, which causes them to absorb more power while charging. In order to avoid this, and at the same time reduce the time it takes to restore the smartphone’s battery, it is recommended to put the device on airplane mode.
To save money, it is not recommended to charge a smartphone if its battery is 80 percent or more charged.
External batteries from Xiaomi
Xiaomi makes a lot of different devices, and since each of them requires charging, the Chinese company has taken care of external batteries as well. The Mi Power Bank series of devices is distinguished not only by a large number of positive reviews from fans. Mi Power Bank is a very durable and durable device that allows you to easily manage any task. Among other things, with Mi Power Bank, a wide selection of accessories and cases for them appeared on the market.
Mi Power Bank is available in various capacities and colors. You can pick up options from 5000mAh to 10000mAh and 20000mAh. The simplest 5000mAh batteries are light, easy to handle and very convenient. 10000mAh will be slightly heavier in weight and the heaviest battery is the most powerful.
It should be noted that on all Mi Power Bank devices, 2 USB ports are available for the user. At the same time, they are charged via microUSB from the network or from a computer. When choosing, it is best to pay attention to the Mi Power Bank 2 or Pro series. Xiaomi power banks are available in white, black, grey, dark gray and pink.
Mi Power Bank 5000 mAh is 156g, thin anodized aluminum body and simple stylish design. The charge level of the device is displayed using LEDs. The battery itself charges in 3.5 hours. The capacity is enough for one or two recharges of any flagship smartphone.
Mi Power Bank 2 10000mAh is a stylish and compact power bank. It has an aluminum body and rounded edges to help prevent scratches and damage while the device is in a bag. The device supports the fast charging function of smartphones. It weighs only 228g, and the thickness is 14.1mm.
For the most demanding, Xiaomi Mi Power Bank 2c 20000mAh is suitable. This is a rather heavy device, the weight of which is 358g. It supports simultaneous charging of two devices and has 2 USB outputs. The body is made of polycarbonate in order not to weigh down the device. At the same time, the material is very durable and the device really copes perfectly with all requirements.