The small but perky EcoFlow ... River 3 is a sterling choice, mostly because it’s small enough to be easily positioned next to the appliance or appliances you want backing up. If the grid goes ...

The EcoFlow ... off-grid), the River Max takes a spectacularly short 96 minutes. It’s a staggered process, so it gets to a “that’ll do” 80% in just an hour then slows down.