Battery advancements haven't kept in step with performance improvements, but the charging tech for topping those cells up has come a long way. Now, most phones come with some flavor of quick-charging technology that promises to fill our capacious flagships in arbitrarily small periods of time. But in the case of Google's Pixel 2 XL, it turns out that its "Charging rapidly" notification isn't always an accurate statement. In low temperatures, Google's flagship will claim to be charging quickly (10W+) when, in fact, it's actually charging at less than 4W.