The description of a typical power bank leaves voltage and watts implicit, as far as I can see https://www.amazon.com/dp/B07S829LBX/ https://www.amazon.com/dp/B

The description of a typical power bank leaves voltage and watts implicit, as far as I can see https://www.amazon.com/dp/B07S829LBX/ https://www.amazon.com/dp/B07S829LBX/ I mean, I can work out what they probably are with a little general knowledge and arithmetic, but it isn’t as clear as you suggest.