The most suitable power supply unit for the Magnetic Powerbank with 5000 mAh and 20 W is the Digitec Fast Charger with 30 W. This power supply offers sufficient power to charge the power bank efficiently and quickly without exceeding the maximum charging power. The power bank supports various fast charging technologies such as Power Delivery 3.0, which can be optimally utilised with the 30 W power supply unit. The more powerful GaN chargers with 48 W or 65 W are compatible, but do not offer any noticeable advantages for this power bank, as the power bank draws a maximum of 20 W of power.