It seems that we've almost reached the limit of battery density in modern smartphones, so manufacturers put their R&D money into developing fast charging tech to compensate. There's a plethora of technologies currently on the market with Oppo's recently announced Super VOOC charging standard on the Find X Lamborgini Edition to be the fastest one yet. It promises to top up a 3,750 mAh battery in just 35 minutes. Well, it might get beaten by Huawei's upcoming fast charging technology that's expected to come with the so-called Huawei Power adapter. It's developed by Astec Electronics...
Source: https://www.gsmarena.com/huaweis_lastest_fast_charging_tech_blows_the_rest_out_of_the_water-news-32190.php
