Battery-powered system designers have the task of increasing power density and enhancing the user experience with faster and cooler charging. The latest innovations in power adapter capabilities have inspired new topologies for fast charging with ultra-high efficiency in mobile devices, from typical buck converters to more exciting inductor-based and inductor-less options. This presentation will highlight the latest battery-charging power architectures for high power density charging solutions, using three-level buck, buck-boost and switched capacitor converter configurations.