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The concept of a “power bank” was developed against the background of the rapid growth of the market of mobile digital devices and their popularization, and was embodied in a portable self-contained power source with a large capacity and compact size.
What does the power bank capacity say?
Power banks exist in different sizes and they have a different capacity(mAh), which is usually indicated on the back or the end of the device. In other words, the more mAh a power bank has, the more energy it can accumulate and give away. For example, iPhone 6 Plus has a battery capacity of 2915 mAh, so if you want to fully charge it - you must have a power bank with a larger volume of mAh than the capacity of your phone.
Do all power banks charge laptops?
No, not all power banks can charge laptops. This is due to the fact that most power banks have an output voltage of only five colts, and to charge laptops, the charger should have a higher output voltage from 16 volts to 20 volts depending on the characteristics of your laptop (check your laptop's AC adapter to find out required voltage). We draw your attention to the fact that only a few specialized Power Bank are able to recharge a laptop.
What is the lifetime of a power bank?
Lithium-ion, including lithium-polymer batteries used in power banks and smartphones, lose their capacity over time (usually from 200 to 1000 cycles, depending on the quality of the battery and chemical composition). The larger the battery, the fewer cycles you will need to charge it, and the longer it will last. By the way, smartphones are discharged daily, thereby reducing the life of their batteries faster than it happens with a powerful power bank.
Why do some power banks require many hours of charging?
Many power banks charge only via USB and it depends on battery capacity. It can take up to 40 hours to fully charge it (for example, a power bank with a capacity of 20,000 mAh). For faster charging, you will need a power supply with higher output voltages (greater than 5 V) and currents than those provided by standard AC chargers, which are usually bundled with mobile devices.
What's the fastest way to charge your smartphone and save energy on your power bank?
Phones with wireless mode enabled can download updates, transfer data, and as a result consume more power when connected to a charger. If you really want to save energy when charging from a power bank, it is recommended to transfer the smartphone in flight mode. This will allow you to charge the battery using only the basic functions of the phone and minimal power consumption.
Do not fully charge the phone with your power bank!
- Your mobile phone consumes energy all the time! In the process of charging the phone battery, the power consumption can be even greater than in normal standby mode. When the phone battery becomes full, with a fill rate of 80-90 percent, the battery charging current begins to decrease, and before the charge level reaches full capacity, most of the battery charger will be lost during phone calls, background applications, etc.
- Imagine packing a backpack—it's easier to fill a backpack up to 80 or 90 percent of the available space. To fill the last 10 or 20 percent of the space will take more time and effort. Therefore, we recommend that you stop using Power Bank when the charge on your mobile device is about 80 to 90 percent to avoid unnecessary energy loss.
Yes, you can watch TV using a power bank!
Yes! As mentioned earlier, most Power Bank on the market have only five volt USB output. But more “advanced” chargers allow you to choose the right voltage so that you can work with larger devices, such as TVs, picnic coolers, etc.