USB-enabled devices (or two AA batteries) can be recharged with this solar charger, which features thin, lightweight, flexible solar cells.
Credit: Christopher Harting
Product: Be Prepared USB+AA Solar Charger
Other products in this section:
How the science of persuasion could change the politics of climate change
Conservatives have to make the case to conservatives, and a growing number of them are.
This battery advance could make electric vehicles far cheaper
Sila Nanotechnologies has pulled off double-digit performance gains for lithium-ion batteries, promising to lower costs or add capabilities for cars and phones.
These boots were made for generating power
Embedded in a boot heel, a microfluidic device based on a 19th-century invention harvests energy from human footsteps.