Google adds more battery health-related features to the Pixel 3, Pixel 4 and Pixel 5 series
Google has introduced a new charging-related feature to newer Pixel smartphones. According to a support document, Google has called the feature 'optimising for battery health', although it only works on the Pixel 3 and later.
Optimising for battery health should not be confused with Adaptive Charging, which slows down charging overnight to preserve battery health. Adaptive Charging still allows your smartphone to reach 100% charge, albeit only by the time your morning alarm rings.
By contrast, optimising for battery health limits charging to 80% if you are gaming or if you leave your phone on charging for four days or more. If the feature becomes active, then your Pixel will display an 'optimising for battery health' notification on your always-on display and in Settings.
Ultimately, we doubt that many people will use this feature. If you do, for whatever reason, removing your Pixel and restarting it will allow you to charge it to 100%. Alternatively, Google recommends removing it and waiting 10 minutes before recharging it from 80% to 100%.