Trust Urban Revolt Power Bank 4400

The miniature Power Bank from the Dutch company Trust attracts attention due to its dimensions. It is small, light and will even fit into a jeans pocket.

volume

Out of 4400 mAh, about 2900 mAh is available for charging gadgets, i.e. The efficiency of the device is approximately 66% — the average result for all external batteries. However, the available volume is enough to recharge most modern gadgets, if not 100%, then for the most part. During charging, you will have to be patient — the output current of 1 A will not allow you to quickly complete the process.

compactness

On the one hand, the compact size of the device allows you to carry it with you every day, but on the other hand, due to its small size, I had to sacrifice space for another USB connector. Although for such a small total capacity it is completely useless — for the simultaneous charging of several smartphones, the battery volume must be larger a priori.

Flashlight

A nice bonus for owners of an external battery is the presence of a built-in flashlight. It cannot be said that it shines well, but to illuminate yourself in order to find a phone for which you are too lazy to get out of bed, or under your feet in a dark entrance, a flashlight can for sure.

Help. Effective capacity is the amount of mAh that the battery can actually give out to charge connected devices, taking into account all energy costs. It differs from the real one due to the fact that the operating voltage of external batteries is 3.6-3.7 V, and they output 5 V at the USB output. Thus, part of the charge is spent on voltage conversion, and another part is lost during heating or operation at low temperatures . Typically, the effective capacity is approximately 65-75% of the real one.