E
EddieM
I'm certainly not going to buy any product based on a guess at its specification, that guess itself being based on the appearance/size/weight of the product.
We know that these eBay-listed things don't have a capacity anything like 100 Ah at 5V - I'd be surprised if (m)any have a capacity greater than 10Ah (at 5V)
I certainly don't - the product I want would be tiny. However, if the listings meant what they say, they certainly would be enormous (and very expensive) - 2,000,000 mAh at 5V is 10,000 Wh, (i.e. 10 kWh) which, in energy terms, would be roughly equivalent to 550 Ah at 18V (i.e. over 100 times bigger than your power tool battery!!
Kind Regards, John
Ok, were talking a completely cross purposes, I'll leave it at this. Anything claiming over 20,000 mAh has got to be big, unless they employ a different battery chemistry with a much higher energy density. I don't know of any such commercial offerings. So with that in mind a 10-20,000 mAh power pack is always going to be roughly 3-4 times the volume of the phone.