How many watt hours? tsa require less than 300 watt hours to bring a device. i would like one that i could carry on with me thanks if you know :)

The batter inside is rated at 3.7 volts, and 40000mAh (40Ah) results in 40x3.7 watts for 1 hour which is 148 whr.

Will this work to power a gopro hero10?

Yes easily, it has more than enough power.

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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ROMOSS Powerbank 40000mAh

Product ID: 366832514

Details

Battery capacity
40000
Brand
ROMOSS
Colour
Black
Connector type
Usb
Special feature
Fast Charging

⚡Fast Charging tech

🎒Compact for backpacks, not pockets

🔋40000mAh ultra-high capacity

Description

⚡ Stay charged, stay unstoppable – power that keeps pace with your hustle!

SLEEK BLACK FINISH - Professional matte black look that complements your tech-savvy lifestyle.
RAPID FAST CHARGING - Cut downtime with advanced fast charging that fuels your devices in record time.
RUGGED RELIABLE DESIGN - Built tough for on-the-go professionals who demand durability and performance.
MASSIVE 40000 M AH CAPACITY - Power through multiple devices and days without hunting for outlets.
PERFECT FOR TRAVEL OUTDOOR - Ideal companion for backpackers and road warriors needing serious power off-grid.

The ROMOSS Powerbank 40000mAh is a high-capacity, fast-charging portable battery pack designed for professionals and travelers. Weighing just under 1kg, it’s optimized for backpack use rather than pocket carry, delivering reliable power for multiple devices with a sleek black finish and robust build quality.

Specifications

ASIN	B087C23HPK
Amperage	2 Amps
Battery Capacity	40000 milliamp_hours
Battery Charge Time	16 hours
Brand Name	ROMOSS
Colour	Black
Compatible Phone Models	All Smartphone
Connector Type	Usb
Customer Reviews	4.7 4.7 out of 5 stars (27)
Included Components	1 package
Item Dimensions	17 x 8.1 x 4.4 centimetres
Item Weight	952 Grams
Manufacturer	ROMOSS
Manufacturer Part Number	PEA40-112-2135
Model Number	PEA40
Number of Batteries	4 Lithium Polymer batteries required.
Number of Items	1
Number of Ports	4
Other Special Features of the Product	Fast Charging
Portable	Yes
Power Source	Corded Electric
Product Warranty	2 year manufacturer
Reusability	Rechargeable
Voltage	5 Volts

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

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Customer service was outstanding when I had questions about the product.

2 days ago

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

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