There are a few things to consider when shopping for a portable charger.
Ability: The capacity of a power bank is measured in milliamp-hours (mAh), but this can be a bit misleading because the amount of power you consume depends on the cable you are using, the device you are charging, and the charging method (Qi wireless charging is less efficient). You will never get the maximum capacity. We try to provide an estimate of what you will get in terms of device fees.
Charging speeds and standards: The charging rate of devices like smartphones is measured in watts (W), but most power banks list voltage (V) and amperage (A). Fortunately, you can calculate the wattage yourself by simply multiplying the voltage and amperage. Unfortunately, getting that maximum rate also depends on your device, the standards it supports, and the charging cable you use. Many smartphones, including Apple iPhones, support the Power Delivery (PD) standard, which means you can use more powerful power banks to charge the device without problems. A few phones, like Samsung’s Galaxy S line, support an additional PD protocol called PPS (Programmable Power Standard) that goes up to 45W. Many phones also support Qualcomm’s proprietary Quick Charge (QC) standard. . There are other proprietary fast charging standards as well, but you generally won’t find power banks that support them unless they come from the smartphone manufacturer.
To cross: If you want to charge your power bank and use it to charge another device simultaneously, it will need pass-through support. The Nimble, GoalZero, Biolite, Mophie, Zendure, and Shargeek portable chargers listed support direct charging. Anker has discontinued support for pass-through as it found that differences between the wall charger output and the device charging input can cause the power bank to quickly turn on and off and shorten its lifespan. Monoprice also does not support direct billing. We advise you to be careful when using pass-through, as this can also cause portable chargers to heat up.
Journey: It is safe to travel with a power bank, but there are two restrictions to keep in mind when boarding a flight: You must have the portable charger in your carry-on baggage (it cannot be checked ) and it must not exceed 100 Wh (watt hours). If your external battery has a capacity greater than 27,000 mAh, you should check with the airline. Below that, it shouldn’t be a problem.
