The article provides recommendations on how to choose the right external battery, how to choose the capacity, current, size and weight of a portable powerbank charger, discusses the features, differences and characteristics of a power bank, gives tips on what additional features should you focus on first.
Modern smartphones and tablets are increasingly discharged at the wrong time. Leading manufacturers of mobile devices Apple, Samsung, Huawei, Lenovo, ASUS, Meizu, Xiaomi, Sony, LG, HTC, Alcatel and others in the race for technical superiority produce powerful devices with a productive filling, a bright screen, many built-in sensors, a large diagonal touchscreen with multi-touch support. As a result, such gadgets have significant energy consumption, while not all of them are equipped with a capacious battery. If you regularly find yourself in a situation where the energy of your smartphone is running out, then this article is for you, and universal external power bank batteries are an affordable way to solve this problem.
There are several dozen brands of USB powerbank manufacturers on the Russian market, among them the most popular are:
USB power bank helps to significantly extend the operating time, it is able to be a backup power source for devices, from simple dialers, Bluetooth headsets to large tablets and stand-alone professional equipment. If you have a USB cable, the external bank power bank can charge a discharged device in a short time anywhere: in a bus, train, at school, in a park or in nature.
What is a portable USB power bank?
A universal external battery, or a portable USB power bank is an autonomous power device designed to recharge mobile devices (cell phone, smartphone, tablet, camera, wireless headphones, as well as other equipment and accessories) in the absence of access to an AC source. a wired network.
The main reason for the emergence of portable USB power banks was the increasing use of mobile technology, the energy level of which built-in batteries lasts for less time. on average half a day or a day. Every year, new smartphones and phablets enter the market, with an increased diagonal, saturated screen brightness, increased performance, support for even more sensors, while the battery remains the same capacity. Large screen with high resolution and high pixel density (PPI), a touchscreen with a wide diagonal. The main factors of high power consumption and fast discharge of the smartphone. To charge such gadgets in the absence of a wired power network, portable external power bank batteries have been developed.
In the modern world, a trip on a business trip or a trip, going on vacation. nature, fishing or hunting is not complete without a portable power bank power charger. In the absence of an electrical outlet, as well as other energy sources, a portable power bank becomes indispensable for uninterrupted communication for a long time, you can not worry about watching a movie in the evening or chatting on social networks that will leave a gluttonous smartphone or phablet without energy.
The average weight of a portable external battery is 150-300 grams, and the capacity is 2500-30000 mA / h, compact models can recharge a smartphone once or twice, and the use of capacious portable USB power bank will allow you to restore the smartphone battery up to 10-20 times. Most external USB powerbank models are equipped with a full-sized USB port and come with a USB-MicroUSB cable, and external batteries with a USB Type C connector are also available. Top-end portable power bank batteries can also be equipped with adapters for charging laptops. Often, for convenience, on the front panel of a portable powerbank the power level indicator is additionally placed, as well as an LED flashlight.
How does a portable power bank charger work?
The portable power bank charger will easily restore the energy of the connected gadget to the required level when the own battery of the mobile device has been discharged. The universal power bank charger is equipped with one or more batteries connected to the controller board, with which the connectors for charging the most portable power bank and connected mobile equipment are also connected.
The service life of a portable power bank charger directly depends on the quality of the batteries and materials used in its composition: the higher quality components used in the production, the more reliable its design and the longer the portable power bank charger will please the owner. Also, the operating mode of a universal power source has a significant impact on the life span.
Recommendations for proper use:
- not to allow deep discharge of the battery (this can lead to its complete failure);
- charge only with currents not higher than those indicated on the bank (energy recovery by high currents leads to a decrease in the battery life cycle);
- Do not charge and try not to use at negative or high temperatures (under such conditions, the capacity, operating time and efficiency are reduced).
Thus, when choosing a universal external usb battery, we highly recommend not stopping at the cheapest models. there is a risk of acquiring a low-quality device. Cheap YUSB banks may contain sloppy assembled items, low-quality parts, because of which the gadget may fail prematurely.
Features, differences and characteristics of power bank
Portable power banks are available in various sizes, with a diverse design, design features, but they are evaluated and differ in main characteristics:
Consider these features, differences and characteristics of power bank in more detail.
Choosing the capacity of an external battery
The capacity of an external powerbank is the most important characteristic that shows how long a powerbank can be an energy source for connected equipment. Simply put, it shows the number of times that a portable additional battery will allow you to recharge the connected gadget due to its own energy. Capacity is measured in milliampere-hours (mA / h).
When choosing the capacity of a universal portable external battery, we recommend that you follow the rule: it should be selected 2 to 2.5 times the size of the battery of the charged device. For example, when choosing a power bank for iphone X, the built-in battery capacity of which is 2716 mA / h, we recommend purchasing an additional battery for iPhone with a capacity of 5000-1000 mA / h. this is enough for one or two full recharges, so as not to be left without communication with regular use of the iPhone.
It should also be borne in mind that the actual capacity of universal external usb batteries specified by the manufacturer is given taking into account the voltage of the built-in batteries 3.7 volts. And when you connect the mobile gadget to a portable power source, the current is transmitted with a voltage of 5 volts. In mobile technology, batteries with a voltage of 3.7 V are used. Thus, a double voltage conversion occurs during charging: first turn the bank from 3.7 V to 5 V and then connect the device from 5 V to 3.7-4.2 V, the losses during this conversion are 20- thirty%. For example, if you charge a tablet with a 10000 mAh battery with a portable charger with the same battery, then the energy of the external battery is enough to restore the phablet battery by only 70-75%.
The best choice of an external power bank battery for a budget smartphone is a compact power bank with a capacity of 5000-10000 mA / h, it is small, it will allow you to comfortably use the device for several days, it can be carried in your pocket or small bag. Users of productive smartphones and tablets usually purchase a power bank for a smartphone with a capacity of 10,000. 20,000 mAh. For long trips, trips, trips or travels, powerful power banks with a capacity of 20,000. 30,000 mAh are best suited.
Current when charging connected devices (output current)
The current strength is measured in Amperes (A) and is considered the main indicator characterizing the charging efficiency of an external battery. The strength of the output current indicates how quickly the connected equipment will be recharged. Portable batteries use a USB connector with an output of 1 A and a USB connector 1.5. 2 A for more demanding tablets.
When restoring the energy of gadgets, we recommend that you follow the following current indicators:
- up to 1 A. cell phones (not smartphones), wireless headphones, bracelets, and other accessories;
- 1–1.5 A. most smartphones, GPS-navigators, portable recorders and other stand-alone devices;
- 2-3.6 A. smartphones with capacious batteries and tablet PCs.
The rate of replenishment of energy is also affected by the charge controller of the connected device, which will limit the amperage if it exceeds the value set by the manufacturer. For example, the Sony Xperia Z3 smartphone has a 1.5 A limit in the controller: when connecting this smartphone to an external portable battery with a port of 1 A and 1.5 A, the current will not be limited, and when connected to a port with a current of more than 1.5 amperes, the smartphone will still consume no more than 1.5 A. For each gadget, the restrictions are different, in some rare cases (often with cheap Chinese equipment) there is no protection at all, so we strongly recommend not connecting to powerful ports without first checking for compatibility. The easiest way to check compatibility is by looking at the specifications of the charged device or the charger (charger) supplied with it. if the current on the complete charger corresponds to the output current on the external battery port (or slightly exceeds.0.1-0.5 A) , you can safely charge your mobile equipment with an external power bank battery. For example, iPhones are equipped with a 1 A charger, and Apple iPad tablets come with a more powerful 2 A RAM. Therefore, we recommend that you charge your iPhone with a universal external battery for iPhone with a 1 A port, and with an iPad tablet, it is better to use an external battery for iPad with a 2 A port.
For owners of modern gadgets with a capacious battery, we recommend choosing a universal external battery with fast charging and a current of at least 2 A, since the connected device will charge slowly with a portable power bank of lower current strength (or it will not be at all with constant use of a recharged device).
To find out the current strength before purchasing a universal portable battery, you should look at the markings next to the USB port. 90% of external power banks have information there. Some universal external batteries for mobile devices are equipped with support for Quick Charge technology (fast charge). Such additional batteries are able to charge the connected device with a higher voltage, but lower current strength, so it is possible to charge the smartphone’s battery to 50-60% in just 30-40 minutes (if the smartphone supports QC technology).
Power bank recharge current (input current)
The universal power bank is charged using the microUSB connector located on its case or in the latest models of the more modern USB Type C connector. The speed of recovery of the energy level of a portable portable battery depends on the voltage and current when connected to a power source. Two factors affect the current strength:
- what current can give a charger;
- what current can a powerbank consume.
In order to charge the battery of the USB power bank, we recommend that you purchase 1-2 A network or car (AZU) chargers. Such a charger is enough to fully and quickly replenish the energy of the universal powerbank charger. It should be borne in mind that external power bank batteries have different maximum input currents and it is better to choose the memory with this attribute in mind. Some models of external batteries with fast charging support the Quick Charge function, which allows you to recharge them with high voltage much faster.
We advise you to purchase quick-charge power banks with a maximum input current of 2 amperes or more and QC support. it is convenient and quick to charge such banks, there is no need to worry about choosing a memory device.
- external battery with fast charging function in the metal housing of Xiaomi Mi Power Bank 3 10000 mAh black;
- power bank with fast charging made of durable plastic Xiaomi Mi Power Bank ZMI QB810 10000 mAh black.
Choosing the size and weight of a portable power bank
The dimensions and weight of a portable external powerbank are directly related to capacity. The higher the capacity of a portable power bank, the larger and larger it will be. Be careful when choosing. Lightweight, compact yet capacious universal powerbanks have not yet been invented! The low weight, small size and very low cost of a bank is 100% indicative of low capacity and mediocre quality.
The optimal choice of size and weight of a portable powerbank depends on the usage scenario:
- miniature girls are more suitable for compact lightweight external batteries with a capacity of up to 5000 mA / h. this energy source is enough for one or two recharges of a smartphone;
- owners of top-end mobile devices recommend a middle ground. fairly compact, moderately capacious portable powerbank at 5000-10000 mA / h;
- for use at home, we recommend that you purchase an average size and weight portable power source with a capacity of 10000-20000 mA / h, which is enough to repeatedly recharge one or more phones and a tablet during a power outage;
- For tourists, lovers of outdoor activities and long trips, we recommend large models of external batteries with large capacity of over 20,000 mA / h. Such universal portable batteries are sometimes equipped with adapters for charging laptops.
Comparison of lithium-ion and lithium-polymer external batteries
Portable USB batteries use two types of batteries:
Compare their advantages with the disadvantages in one table: