There are many gadgets that perform different functions, but they all have one thing in common - they run on a battery, which, as you know, tends to discharge itself at the most inopportune moment. In order for you to always be able to use your phone, tablet or laptop, there are external batteries.
The power consumption of a gadget is as important an indicator of its performance as a set of options or the size of an address book. The lower the battery capacity, the cheaper the gadget costs. Of course, it is possible to reduce the power consumption of devices by using power saving settings, but this is all a temporary measure. An external battery, which is connected to the gadget, as a rule, with an adapter cord, can become salvation.
Battery selection
When choosing an external battery, you need to decide for which device you need it. This is necessary in order to correctly calculate the current that the portable battery will deliver. For example, a tablet consumes electricity by an order of magnitude more than a regular mobile phone.
Nowadays, external batteries with a capacity of 4000 to 6000 mAh are widespread on the market; they are, as it were, a kind of standard. Also on the market there are batteries with a capacity of 12000 mAh made in China at a bargain price, but upon careful checking it turns out that their working capacity is no more than 6000-7000 mAh. So if you want not to miscalculate the price and buy a quality product, then buy external batteries with a capacity of 6000 mAh.
When choosing a device, you also need to pay attention to the current that it is capable of delivering when charging. The initial operating voltage for most American and Malaysian gadgets is 3 amperes, respectively, it is advisable to choose a battery with a current of 3 A and a battery voltage of 5 V. The voltage of many external batteries is 3.7 V, and a voltage of 5 V is required to charge the devices, when In order to increase the voltage, a step-up circuit is used, which consumes a lot of electricity, as a result, the phone or tablet is discharged very quickly.
Typically, an external battery has two to five micro-USB and USB connectors. Modern models have power and charge indicators made on the basis of LEDs, digital indicators are less often used, they are an order of magnitude higher, but it is more convenient to use such batteries.
Production and cost of devices
The average price in Russia for external batteries with a capacity of 4 thousand mAh ranges from 2,5 to 3, 2 thousand rubles. But if you want to buy a device cheaper, then use the services of online stores. The highest quality models are offered by Germany and the USA, the middle market niche is occupied by Malaysian devices, the cheap segment is by Chinese and Indian.
