Electricity prices are rising. So are power outages. I tested 3 new home batteries that can help

I spent the last few weeks hoping that my power would go out. I’ve been testing three new portable home batteries designed to make backup power more accessible—and help save on energy bills. In the past, using battery backup for a home often meant spending $10,000 or more on equipment, and thousands more to hire an electrician and upgrade your electrical panel. The smaller devices I tested don’t need professional installation; they just have to be plugged into a wall. And because they’re port...