The Volt doesn't need it. You can buy a fair amount of gas for $67/month to supplement the battery range. And I have found the Bolt range to be worry-free.
lol, there is this thing I use called Google Search.Where'd you find those numbers? The email response I got was the run around and the website didn't show anything.
That said, the ZipCharge Go isn't available yet. According to InsideEVs, the startup plans to release a 4 kWh and an 8 kWh version, as well as to start deliveries in the fourth quarter of 2022. It can be leased for at least £49 (US$67) per month, though it will also be available for purchase to EV owners who don't mind paying for one and to businesses like hotels that don't have installed charging facilities. While ZipCharge has yet to reveal a price for it, The Sunday Times Driving section says the company aims to sell it for around the same cost as a 7.2kW home charging port installation.