The Pixel 2 XL has been the talk of the town, thanks to a different issue popping up everyday. After the screen burn in and blue tint issue, the latest issue to be found on the smartphone is capping of the charging at 10.5W, even though it supports 18W charging.
The Pixel 2 XL sports a 3,520mAh battery capable of 18W fast charging, facilitated by the supplied charger. As discovered by user Nathan K., the charging tops out at 10.5W, without utilising the complete 18W of power that the charger provides. Nathan posted the analysis complete with graphs to show how the charging mechanism in the Pixel 2 XL works. According to the graphs, the phone starts to charge at approx. 16W, but drops down to around 10W in under 10 minutes. It maintains a steady 10.5W till it reaches 50% after which there is a steady decline till the phone reaches 100% resulting in a total charging time of about 2.5 hours.
Most smartphones that support Quick Charge, charge quickly for the initial 50% or so, after which there is a steady decline in the charging speed. Contrary to this trend, the Pixel 2 XL seems to get about 35% charge in 30 minutes of charging compared to certain smartphones that charge close to 50% in the first 30 minutes of charging.
There can be many reasons for this erratic way of charging, one of which might be that the Power Management has been wrongly defined, or it has deliberately been kept this way to slow the ageing and degradation of the battery.