Many people are familiar with the problem of complete discharge of a mobile device at the most inopportune moment. Sometimes it is urgent to get in touch, or go out of the house or office, and the smartphone treacherously refuses to turn on. In such cases, every minute of charging can be critical. Therefore, many gadget manufacturers equip their creations with support for fast charging technology. How do these or other companies cope with it, recently decided to investigate the resource GizmoChina.Five gadgets from the most popular manufacturers were tested. They were Samsung Galaxy C9 Pro, Huawei Mate 9, OPPO R9 Plus, Vivo X9 Plus and Apple iPhone 7 Plus. The latter has a battery capacity of just 2,910 mAh, while that of most of its above-mentioned Android competitors is 4,000 mAh. After a full discharge, they were simultaneously connected to chargers in order to determine which one would gain a charge faster.The best result according to the test results showed Huawei Mate 9. The gadget charged to 100% in just 90 minutes. The closest to this result was the OPPO R9 Plus, which got 98% of the charge, but the flagship from Apple was noticeably behind. Its result at that time was only 57%, and it took 196 minutes to fully charge it, despite the smaller battery capacity. The results of the Apple smartphone seem disappointing. On the other hand, the A10 processor allows for lower power consumption and, consequently, longer battery life compared to competitors. In addition, the manufacturer has promised to work on support for fast charging in the iPhone 8.