Sometimes you just want to get it done, and done swiftly.

Or at least reasonably swiftly. Most chargers are pretty slow, and take hours to recharge the batteries, even the smaller ones.

This can be very inconvenient, or even non-viable at times. It's just too slow.

There is plenty of juice available at most outlets (often it's 20 amps at 110 volts, in the US). Yet battery chargers typically make use of only a small fraction of what is available.

What are some possible solutions?

--while staying within the approach of recharging at available electrical outlets -- I've used other systems as well, like solar and generators and no-tech and min-tech and eff-tech (efficient) plus extra batteries when needed, which all have their pros and cons; but this thread is focused on this particular approach (which I like in some ways, for some tours at least).

The idea is to be able simply to plug in now and then -- and, in a more agreeable amount of time, or a significantly shorter time, capture all the electricity you need.

What are some of the options for achieving the ability to do this?