Boy, has a lot changed. One thing has become evident – power is the lifeblood of any device and the alibility to recharge it quickly is paramount to users.
In fact, we have seen in recent tests where a 5V/3A charger (15W) meets or beats a so-called fast charger to 100%.
In most cases, there is more marketing hype than reality in smartphone fast charge claims. Most start by claiming, for example, 50% in just 30 minutes neglecting to tell you that the battery has been flood charged at say 15V/4A (60W) and any more would risk thermal burnout. Fast charge is a three or even four-stage charge.
Please note that should you find any errors please let me know – there are a lot of numbers here.