Power Bank Varta 57909 20000 mAh Lithium Polymer Wireless Charging

The VARTA Power Bank 57909 offers a 20,000 mAh lithium polymer battery in a compact white housing, combining wired and wireless charging to keep devices powered while travelling. It supports wireless charging up to 10 W and provides wired output via two USB-A ports and one USB-C port with a combined maximum output of 20 W. The power bank is designed for universal compatibility with smartphones, headphones, smartwatches and activity trackers and includes safety technology and pass-through charging for charging the bank and connected devices simultaneously.

Advantages

This VARTA wireless power bank provides a high capacity of 20,000 mAh, Quick Charge 3.0 support and Power Delivery for faster wired charging up to 20 W, plus 10 W fast wireless charging for compatible devices. Multiple output ports allow up to four devices to be connected at once. Built-in safety features and pass-through charging increase convenience and protect connected devices during use.

Suitable for

• Charging smartphones on the go
• Powering wireless headphones and earbuds
• Charging smartwatches and activity trackers
• Providing backup power for multiple devices during travel or work

Key specifications

• Battery capacity: 20,000 mAh (lithium polymer)
• Maximum total output: 20 W
• Wireless charging: up to 10 W
• Ports: 2× USB-A, 1× USB-C
• Number of devices simultaneously: up to 4
• Weight: 0.438 kg
• Colour: White

How to use

Connect devices to the USB-A or USB-C ports using the appropriate cables for wired charging, or place a Qi-compatible device on the centre of the power bank to start wireless charging. Use the USB-C input/output port to recharge the power bank itself; when pass-through charging is supported you can charge the power bank and connected devices at the same time. Observe device charging indicators to confirm power delivery and remove devices when fully charged.

Recommendations

For best performance, use certified charging cables and chargers that support Quick Charge or Power Delivery. Avoid exposing the power bank to extreme temperatures, and store it partially charged if not used for long periods. Check device compatibility for 10 W wireless charging to ensure optimal wireless performance.