Tronic Power Bank 10,000 mA - £11.99 @ LIDL

This appears to be the instruction manual for it. If so, then the more detailed specs are-

Technical specifications:

• Built-in rechargeable battery: 3.7 V , 10,000 mAh, 37 Wh (Lithium-ion)
• USB type C input voltage / current (PD): 5 V , 3 A / 9 V , 2 A/ 12 V ,1.5 A
• USB type C output voltage / current (PD): 5 V , 3 A / 9 V , 2 A / 12 V , 1.5 A
• USB type A output voltage / current (QC3.0): 5 V , 3 A / 9 V , 2 A / 12 V , 1.5 A
• Maximum output power: 15 W*
• Maximum output current: 3 A*
• Minimum output current: approx. 60 mA
• Operating temperature: 5 – 35 °C
• Storage temperature: 0 – 45 °C
• Humidity (no condensation): 10 –70 %
• Dimensions: approx. 132 x 68 x 16 mm
• Weight: approx. 216 g

NOTE:

• If you use all the USB ports, a voltage of 5 V will output at the outputs. The maximum output current must not exceed 3.0 A for all outputs. If all USB outputs are used, fast charge is not possible.
• If USB type A output 2 or PD port 1 is in quick charge or PD mode, and another USB port is connected to another device for charging, the quick charge mode or PD mode will be terminated and switched to normal charge mode. All devices will now be charged at 5 V each.