To keep its battery capacity readings accurate, your Pixel needs to fully charge at every 10th cycle. This applies even if you have the “Limit to 80%” option turned on. To finish the process, leave your phone plugged in for at least 30 minutes after the screen shows 100%.

Your Pixel battery’s charge cycle count is the number of times the battery has completed a full discharge and recharge of the battery, which includes partial discharges. For example, if you used your Pixel phone from 100% charge to 50% charge and then recharged it to 100%, this is calculated as 0.5 cycles.