It's a super handy portable charger called the Caricabatterie universale Ansmann UBC Powerline 4 Ultra. It can charge up to four different types of batteries, including NiMH and Li-ion, and comes with a built-in adapter. The best part is that it automatically stops charging when the batteries are fully charged and has a built-in maintenance mode to keep the batteries at 100% charge. You can use it to charge both your phone and power bank via USB, making it a must-have for anyone who's always on-the-go!