According to users, the only significant drawback of modern mobile gadgets is insufficient battery life. Manufacturers are trying to reduce the energy consumption of devices and increase the capacity of the built-in battery, but with heavy Internet use, the battery charge is still only enough for one or two days. If the user is in the village or in a vehicle, it does not matter – there is always a charger at hand. However, very often situations arise when it is several days’ journey to the nearest source of electricity. In such cases, it is most convenient to use a special external storage battery – the so-called «power bank». There are many models, with different characteristics and price parameters. How to choose an external battery and which brand is good for power bank will be discussed in this article.
What is power bank
Under the loud name Power Bank hides a special model of a universal external battery, consisting of a set of rechargeable lithium-ion or lithium-polymer cells, combined into one battery, hidden in a portable plastic, polycarbonate or metal case, with standard one or more USB outputs. Different models of power bank for a phone differ in battery capacity, design, configuration and a number of other characteristics, but they all have one purpose – to charge other mobile devices. To restore the charge of a power bank, it is enough to connect it to the mains (through a standard charger) or to another compatible device with a USB output (most often it is a computer or laptop). Below we will also tell you which power bank is best for iPhone, as well as for Samsung smartphones.
How many times can I charge my smartphone or tablet
Before choosing a specific model of an autonomous backup power source for recharging their gadget, many try to determine the maximum number of full charges of their phone by dividing the capacity of the external battery by the capacity of the battery of a smartphone or tablet. But such a calculation is never confirmed in practice: for example, an external battery for a phone with a capacity of 10,000 mAh will not be able to fully charge your mobile device four times with a built-in battery of 2,500 mAh. The reasons for this discrepancy are:
- design features of the bank. The voltage of the built-in rechargeable battery is 3.7 V, and the charge voltage should be 5V. To increase it, a special controller is used, which also consumes energy in the process of voltage conversion;
- losses in controllers of connected mobile devices;
- self-discharge of the battery (especially after its intensive use for several years).
Therefore, when choosing a portable battery, it is necessary to take these losses into account and give preference to devices with a 20-30% capacity reserve.
Which power bank is best for iPhone?
Today’s iPhones require a lot of power to run applications. Therefore, usually acquaintance with the characteristics of a power bank begins with the battery capacity of the proposed device. This indicator is considered basic for any type of battery. It is measured in milliampere-hours and by its value you can determine how many times you can charge your gadgets from a fully charged power bank.
It should be borne in mind that with an increase in the capacity of a bank, its dimensions and weight increase and, when choosing a battery for a specific device, you need to make sure that it will be convenient for you to carry an additional gadget in your pocket or in a small purse. Therefore, the capacity of the external battery must fully match the type of your mobile devices. Thus, an external battery for phones or smartphones with a battery of up to 5000 mAh, when used in “city” mode, must have a capacity of over 7000 mAh. Well, if you are deciding how to choose a good power bank for a long journey or for a camping trip, then external batteries with a large capacity of 20,000 mAh in a sturdy metal case are best suited for such purposes.
Which power bank is best for Samsung?
Among the characteristics that determine the convenience of use is the charging current, which is given by the power bank. Usually it is 0.5 – 2 A. This indicator affects the charging speed of the connected device. Large capacity devices often have several outputs with different current draw rates. It should be borne in mind that these values are most often maintained in cases where only one device is connected for charging.
You should also pay attention to the current given by the network power supply to the external battery itself. Usually, preference should be given to devices in which the standard charging current is equal to the given current.
In addition, it should be borne in mind that charging mobile devices with less current than the passport requires will not harm them. It is just that the charging process will take longer. Very often, when choosing a power bank among the company’s offers, users do not pay attention to the presence of a corresponding cord for connecting a mobile phone in the basic configuration. If a suitable cable is not available, you will have to purchase an additional set of adapters or a cable of the required length.
In addition, when purchasing an external battery, pay attention to the socket for connecting the AC adapter of the power bank itself. The best option would be a regular microU, and then the device will be fashionable to charge not only from the mains, but also from a computer. Most economy class models use LEDs to indicate the state of charge, and more models that are expensive use informative liquid crystal indicators.
Well, in order for you to be able to determine exactly which power bank is best for Samsung, we summarize all the information in 5 tips:
- The main characteristic of an external battery is its energy capacity, measured in milliampere hours. The larger the capacity, the more times you can recharge your mobile device;
- The value of the delivered current in Amperes affects the charge rate. The more current the power bank gives, the faster your phone’s battery will fill up;
- Very often the battery capacity declared by the manufacturer is too high. Therefore, it is better to take a device with a little more capacity than you need;
- Consider the self-discharge of the battery. Charge the battery just before long trips or hikes. You also need to know that over time, the capacity of the batteries decreases, regardless of which company to choose the power bank;
- It is best to give preference to a power bank for a smartphone with multiple outputs. This will allow you not to waste time on charging several gadgets, but to fill them with energy in one go.
Which brand is good for power bank?
Today on the market you can find hundreds of different brands that produce power banks. However, it is obvious that you should not buy the cheapest models produced under little-known or unknown brands. Yes, they can cost much less, but the quality will also be low.
Below we list 20 brands that have been on the market for quite some time, and whose products are in demand due to their decent quality.
- Anker Innovations
- GP Batteries
- Flipkart Smartbuy
You can definitely trust the power banks under these brands. However, this does not mean that all other brands that did not make this list are unworthy. Perhaps other brands make really good and high quality power banks. However, they are probably just not well known in the world and they have few reviews in English.
We hope that this small guide has shed light on the main questions related to choosing an external battery and now you know which power bank is best. By the way, if you know any worthy brands that you have not mentioned – write to us and we will review their products.