Astrum 20000mAh Power Bank, Dual USB-A, USB-C Input, 74Wh - PB20K

20,000mAh of Real, Honest Capacity - and Two Ports That Do Exactly What They Say

The Astrum PB20K is built around A-grade lithium polymer cells with up to 90% efficiency, providing dependable everyday charging from a high-capacity 20,000mAh power bank.

Two USB-A Outputs - Charge Two Devices at Once

Two USB-A output ports let you charge two compatible devices simultaneously. Each USB-A port provides standard 5V/2A output.

The USB-C and Micro-USB ports are used to recharge the power bank itself. They are input-only ports and do not output power to connected devices.

20,000mAh / 74Wh - Roughly 3 to 4 Full Charges

The 20,000mAh / 74Wh capacity can provide roughly 3 to 4 full charges for an average smartphone, depending on the phone's battery capacity, charging conditions and conversion losses.

At 74Wh, the PB20K falls below the commonly applicable 100Wh airline carry-on threshold. Always check your airline's current battery and baggage requirements before travelling.

Protected Charging

A built-in smart IC provides protection against overcharging, overheating and short-circuit conditions, helping protect both the power bank and connected devices during everyday use.

Technical Specifications

• Model: PB20K
• Capacity: 20,000mAh / 74Wh
• Battery: A-grade lithium polymer
• Outputs: 2 × USB-A
• USB-A Output: 5V/2A max each
• Inputs: USB-C / Micro-USB
• Input Rating: 5V/2A
• Efficiency: Up to 90%
• Protection: Overcharge / overheat / short-circuit
• Dimensions: 137 × 69 × 28mm
• Colour: Black
• Warranty: 12 months limited

Please Note

The PB20K provides standard 5V/2A output through its USB-A ports and is not a fast-charging power bank.

The USB-C port is input only. It is used to recharge the PB20K and cannot be used to charge a phone or other external device.

What's in the box
1 x Astrum PB20K Power Bank
1 x USB-A to USB-C Charging cable
1 x User Guide