The main disadvantage of many smartphones and tablets is the low battery capacity. Because of this, the device can be discharged at a crucial moment, which is facilitated by various factors. For example, large screens, resource-intensive applications, work in 3G and 4G networks. In order not to be left without communication away from the outlet, you can use the block to charge the phone.
Content
- Purpose and design
- Main characteristics
- Battery selection
Purpose and design
An additional charger for a phone is a device containing a battery, controller, converter, input and output connectors. It is also often called "power bank" or "power bank" - from the English power bank. The main purpose of the controller is to create the required charging mode, protection against overload, overcharge, short circuit, overheating. Many portable chargers also have a flashlight and service lights.
To use the battery to charge your phone on the go, it should be charged first. For this, the "powerbank" is equipped with a Micro USB connector, to which the network adapter is connected via a cable with an appropriate plug. You can also charge the power bank from the USB port of a computer or laptop. The portable battery is powered by a standard USB type A or C. For this reason, you can connect a mobile device with the cable supplied with the gadget.
Lithium batteries used in powerbanks produce 3.7 volts. The USB port requires 5 volts. To obtain the required voltage, a step-up converter is placed in the portable charger.
Some of these accessories have two outputs for charging two devices at the same time. Solar powered batteries are ideal for travelers. Thanks to her, neither the power bank nor the phone will be left without energy at a critical moment.
Main characteristics
The main characteristics include the following:
- Capacity. The higher it is, the more devices can be charged at the same time from one prototype charge. The number of full charge cycles of a smartphone or tablet also depends on this indicator - from 5-15 to 100 percent.
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Type of. The most commonly used batteries are lithium-ion and lithium-polymer batteries. The first of them are distinguished by their long service life, lack of "memory effect" and low self-discharge. Such a battery must not be exposed to overheating, due to which the tightness of the batteries is broken. - Lithium polymer batteries are considered more advanced. They are compact, lightweight and highly energy efficient. Such batteries are afraid of deep discharge. Due to their construction, they are also prone to fire and even explosion. In this case, gas is released that is harmful to human health.
- Output current. The higher it is, the faster and more efficiently the smartphone will charge. Miniature "power banks" issue from 200 to 500 milliamperes, and conventional ones - from 0.5 to 2 amperes and above. In the first case, the accessory will only keep the phone charged. If the latter itself consumes more than the battery gives, then a discharge will occur. Charging an Apple Iphone requires between 1.5 and 2.1 amperes.
Battery selection
When choosing an accessory by capacity should be guided by a similar indicator of a mobile device. «Powerbank "should be 20-30 percent more powerful than the battery of a smartphone or tablet. This is necessary in order for the accessory to be able to charge the phone one hundred percent once before it is completely discharged.
If you need to get several charging cycles, then it is worth remembering that the increase in the capacity of the portable battery does not directly affect this indicator. Accordingly, you need to choose such an accessory with a margin of capacity.
For office use, the ideal option would be small 1 amp-hour battery. It has the smallest dimensions and weight. With the help of such an accessory, you can, if necessary, give 30-40 percent of the charge. If you have two mobile devices, such as a smartphone or tablet, you can purchase a powerbank with two outputs.
You should also beware of counterfeits. One of its hallmarks is the promise of a very large capacity - from 30 amp-hours - at a low price. Accessories like these can be dangerous and will not actually perform as advertised.
Thus, the battery for charging the phone is useful for those who always want to stay in touch, regardless of the conditions of their stay. These accessories should only be purchased from official retailers to ensure quality and performance.
