actually the power tank has shit all in terms of battery capacity and its priced at $4000 in Australia, its an overpriced gimmick that offers very little in terms of range improvements, I can buy tesla 18650 batteries for pretty cheap so if I was after another battery pack I could buy a second hand worn out zero battery pack and exchange the old batteries with 18650's, there are youtube tutorials on how to do this.
what I was asking was can the bike be charged while riding, from your responses I'm thinking yes?
what I was actually thinking is modifying an Uninterrupted power supply, connecting a few solar cells to a windshield and on my side saddles to trickle charge the ups lithium batteries, and use the ups (when its full) to charge the bike (because solar panels don't give enough WATTS to charge the bike directly), if it can be used to put some power into the battery while riding that would also increase the range slightly, I'm guessing the increase would be about 10% on a full trip and also if I stop the ups could remotely charge the bike without needing to be plugged into a power point, great for a bit of extra range.
The Ups can be plugged into a power point to slow charge just like the bike can, or use solar power, the downfall to that is that it would take the UPS like 2 days of direct sunlight to charge completely and could not charge the bike to full in one go anyway, so it would take probably a few days to solar charge the bike in this way.
The point being that you can get all of your power from the sun and get your bike to 100% charge from a setup that's no bigger then a side saddle. Meaning its completely free energy from the sun and no power points required meaning you can camp out and never be stuck as long as you have sunlight. you could also get some fold out solar cells to lay on the ground to help power the UPS if you need it to charge faster, which could halve the time you'd be waiting.
I know its not practical, but it would work.
I have a fast charger for convenience, this idea is just a working theory that I might use to travel around australia for free with...