Skip to Content

Better Battery Gauge

Your laptop’s battery gauge says you have an hour of computing time left, but don’t count on it. The older a lithium-ion laptop battery, the less energy it can typically store – a variation that can throw off the accuracy of conventional battery gauges by more than 50 percent. This winter, Texas Instruments plans to introduce an inexpensive “gas gauge” chip that not only takes into account a battery’s original capacity but also measures its impedance – the resistance to electrical current caused by age, frequent use, and other factors. Built into the chip are mathematical models of lithium-ion chemistry that use impedance measurements to calculate how much a battery has degraded and adjust predictions of remaining charge accordingly.

Keep Reading

Most Popular

still from Embodied Intelligence video
still from Embodied Intelligence video

These weird virtual creatures evolve their bodies to solve problems

They show how intelligence and body plans are closely linked—and could unlock AI for robots.

pig kidney transplant surgery
pig kidney transplant surgery

Surgeons have successfully tested a pig’s kidney in a human patient

The test, in a brain-dead patient, was very short but represents a milestone in the long quest to use animal organs in human transplants.

conceptual illustration showing various women's faces being scanned
conceptual illustration showing various women's faces being scanned

A horrifying new AI app swaps women into porn videos with a click

Deepfake researchers have long feared the day this would arrive.

thermal image of young woman wearing mask
thermal image of young woman wearing mask

The covid tech that is intimately tied to China’s surveillance state

Heat-sensing cameras and face recognition systems may help fight covid-19—but they also make us complicit in the high-tech oppression of Uyghurs.

Stay connected

Illustration by Rose WongIllustration by Rose Wong

Get the latest updates from
MIT Technology Review

Discover special offers, top stories, upcoming events, and more.

Thank you for submitting your email!

Explore more newsletters

It looks like something went wrong.

We’re having trouble saving your preferences. Try refreshing this page and updating them one more time. If you continue to get this message, reach out to us at customer-service@technologyreview.com with a list of newsletters you’d like to receive.