Would it be possible to use this as a mini ups (uninterrupted power supply) so that it could stay permanently plugged and passing through power?

The XT-20000QC3 is not suitable as UPS.

Can this power devices on the 12v & usb outputs at the same time?

Yes. You can use the DC out and the USB out simultaneously. I use mine to provide extended power to a guitar pedal board. Using the USB to provide back up power to Pedaltrain Volto 3 ( the Volto retains virtually full charge while it is being supplied this way and also gives the 9v source for the pedals. The DC is set to 15v and goes direct to power a Shure wireless receiver / tuner. The battery is slim enough to fit under a Pedal train Nano like the Volto. Never used more than 20% for a 4hr session. One thing you have to ensure is that you don’t use it to power only a low draw device as it has an auto switch off when the draw is low enough. XT Power has a later version which doesn’t auto switch off. But never found this an issue in my use.

Could this power 2 roland boutique synths at the same time via the two usb ports?

You can simultaneously connect 2 devices to the USB outputs. The maximum output power of each output is 10W.

How many Watt/hours is this device? Ryanair only allows 160 w/h All calculators seem to be asking for the voltage, how do we do this calculation?

The XT-20000QC3 has a capacity of 73Wh. This capacity is also written on the back of the Powerbank. When calculating the capacity, the voltage refers to the internal cell voltage of the Powerbank. The internal cell voltage of the XT-20000QC3 is 3.6V. Calculation: 3.6V x 20100mA = 73Wh

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PowerBank 20000 mAh QC3-AO-PA with Real-time Display LED Display - External Mobile Phone Batteries, High Capacity Power Bank with 65 W Power - Fast Charging for Laptop & Smartphone via USB

PowerBank 20000 mAh QC3-AO-PA with Real-time Display LED Display - External Mobile Phone Batteries, High Capacity Power Bank with 65 W Power - Fast Charging for Laptop & Smartphone via USB

Product ID: 119159373

Details

Battery capacity
20100
Brand
XTPower
Colour
Black
Connector type
Micro USB

⚡65W max power output

🔋20100mAh high-capacity battery

🔌Multi-port: USB, USB QC3 & DC (5-24V)

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Description

⚡ Stay powered, stay ahead — never miss a beat with XT-20000QC3!

POWER THAT LASTS ALL DAY - Massive 20100mAh capacity keeps your devices charged through back-to-back meetings and weekend getaways.
CHARGE SMARTER NOT SLOWER - 65W max output with Quick Charge 3.0 ensures your laptop, phone, and tablet power up faster than standard chargers.
INTUITIVE POWER MONITORING - Built-in display shows real-time power draw and remembers your voltage settings to prevent accidental overloads.
SLEEK PORTABLE AND LIGHTWEIGHT - At just 450g and compact dimensions, it’s the perfect power companion for the modern professional on the move.
UNIVERSAL COMPATIBILITY UNLOCKED - Versatile DC output (5-24V) plus USB and QC3 ports cover everything from laptops to smartphones without extra adapters.

The XT-20000QC3 is a high-capacity 20100mAh power bank featuring a powerful 65W max output with Quick Charge 3.0 and versatile DC voltage support (5-24V). Designed for professionals, it charges laptops, tablets, and smartphones efficiently with multiple ports and an intuitive display that tracks power usage and saves your preferred settings. Lightweight and portable, it’s the ultimate all-in-one power solution for on-the-go productivity.

Specifications

ASIN	B07ZT9FFZ7
Amperage	21 Amps
Battery Capacity	20100
Battery Cell Type	Lithium Ion
Battery Charge Time	8 Hours
Battery Weight	450 Grams
Best Sellers Rank	600 in Mobile Phone Portable Power Banks
Brand Name	XTPower
Colour	Black
Compatible Devices	Laptop, Smartphone
Compatible Phone Models	All
Connector Type	Micro USB
Customer Reviews	4.2 4.2 out of 5 stars (69)
Item Dimensions	174 x 78 x 21.5 centimetres
Item Dimensions L x W x Thickness	30L x 23W x 11Th centimetres
Item Weight	450 Grams
Manufacturer	XTPower
Manufacturer Part Number	246972
Model Number	246972
Number of Batteries	1 Lithium Ion batteries required. (included)
Number of Items	1
Number of Ports	2
Other Special Features of the Product	12-24V DC round plug for 12V, 15V, 16,5V, 19V, 20V and 24V, High capacity with 20100mAh (3.7V) / 71Wh., Standard USB output, USB output with QC3 fast charging function
Output Current	1.8 Amps, 2 Amps, 2.1 Amps
Power Source	Corded Electric
Reusability	Rechargeable
Unit Count	1.0 count
Voltage	24 Volts, 3.7 Volts
Warranty Type	No Warranty

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$498.59

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In stock

Sold byAmazon Northern Mariana IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Northern Mariana Islands.

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