I have been noticing this issue since I brought 6Z.
The problem is, when I connect my 6Z with a regular 10W (5V-2A) charger, the phone will only charge at 5W (5V ≈ 0.9-1A) max. Not matter if it's either switched off or on. I have tried several different combinations of chargers and cables, but I only get a max of 5W. Charging at this speed is real slow. It takes an average of 6 hours to charge the phone from dead to 100%.
Below is the screenshot from the Ampere app with a 10W charger.
However, when I use any other power source with a higher amp like a 5V-2.4A Asus powerbank, the phone would charge at roughly 10W (5V ≈ 1.9A). I have confirmed with my testings that the phone would only trigger into 10W charging if it's plugged into a 2.4A power source. When I charge my phone using this, it charges quickly from dead to 100% in 4 hours.
Below is the screenshot from the Ampere app with a 5V-2.4A Asus powerbank.
See that + sign near the battery icon, it only appears when I use a 2.4A charger. We get ++ sign when we use a18W charger.
I know that we can quick charge 6Z with a 18W charger in 2 hours but, I like to use slow yet snappy 10W charging along with battery care method to prolong my battery life endurance.
I just want Asus to kindly enable a true 10W charging, so that we can easily charge our devices with the already available 10W chargers laying around us.
Also, when I use a Gionee 18W charger, the phone should technically charge at 18W but, it only charges at 5W max.
However, when I use the inbox Asus adapter, the phone charges at normal 18W with the same and different cables I use to test out. The same also happened to me with a different (I don't remember the brand but I know it wasn't a cheap one) 18W charger too. The phone would like to charge at a maximum of 5W. I do like to clarify that I have tried some other 18W chargers, and they all work flawlessly. It seems that only about 10-20% of 18W chargers don't work. What is happening here with the 6Z? Why do 6Z love to charge at 5W? Can someone please explain?@Anders_ASUS @Titan_ASUS @CH_ASUS @LP