Are there any Dash Charge compatible power banks out there? Would a power bank with the same output rate as a Dash Charge socket adaptor (5V 4A) charge just as quickly? I mean with all the Pokémon GO and Ingress business...
I don't think a power bank with a 4 Amp output would work because it would lack the control circuitry, but it's academic anyway as I doubt there's even one available.