This sleek, low-cost battery will keep your power on if the grid goes down

A new backup battery from BioLite is slim enough to fit behind your fridge—and much cheaper than other home battery systems.

If you live in a place where climate change is making power outages more common—that is, basically anywhere on the planet—you might have considered buying a home battery system. But typical battery backup tech is expensive, ranging from around $10,000 to $20,000. And it’s not a DIY project; you’d need an electrician to install it.