Batteries

Until we find a way to effectively store energy, the power on California's electricity grid will rise and fall with the sun.

• By Sinduja Rangarajan

The future of rechargeable batteries may lie in the bane of unboxing existence.

• By Nathan Collins

Nail polish, batteries, hand sanitizer: You may not think of these regular household items as toxic, but they are, and they’re poisoning our water and food supplies.

• By Carmen Marriott

Charged building material could make the renewable grid a reality.

• By John Upton