The Harley-Davidson 5000mAh power bank is a portable backup battery with a 5000 milliampere-hour (mAh) capacity, designed for charging devices on the go. It is a black, ebay listing says it is and can be found on platforms like eBay. The specific dimensions and weight are not detailed in the search results, but it is described as a sleek and portable power bank. 
Key Features:
Capacity: 5000mAh
Color: Black
Design: Sleek and portable
Application: Mobile battery, accessories battery
Rechargeable: Yes
Battery Type: Lithium-ion (Li-ion)
Shelf Life: 3 years 
Potential Uses:
Charging smartphones, tablets, and other USB-powered devices
Providing backup power for outdoor activities or travel 
Additional Information:
The power bank may include features like a battery life indicator, charger, and portable design. 
It is compatible with various devices and can provide multiple charges for smaller devices like smartphones. 
A 5000mAh power bank can fully charge a 2500mAh phone battery approximately two times, according to Benks.