Tips and Myths About Extending Smartphone Battery Life

Ashlei Temeña’s family trip to Disneyland last Thanksgiving break turned into a nightmare when her smartphone battery hit empty.

Ms. Temeña, a San Francisco support technician, had gotten separated from her family and realized she had no way to find anyone. Instead of riding roller coasters, she wandered around searching for the group — eventually locating them four hours later watching fireworks.

“I wanted to throw my phone on the ground by the end of the day,” Ms. Temeña said.

Many consumers can relate. Despite the leaps forward in mobile phone technology with crisp, clear screens and faster chips, batteries have made only sluggish progress. That has propelled a desire for longer battery life to the top of the list of factors considered by consumers when they purchase smartphones, according to a 2014 survey by the research firm IDC.

So why is battery technology still underwhelming? Plenty of companies have been developing smarter battery technology for years, including methods to increase battery capacity tenfold or charge devices by pulling energy from the air. But lithium ion, the technology that most mainstream batteries are based on, is low cost and easily reproducible while being safe — so we’ll be stuck with it for the foreseeable future, said Charlie Quong, an executive at Mophie, a battery accessory maker, in an interview.

“There’s a lot of investments on all fronts for improving the technology above and beyond that, but I don’t think we’re going to see that hitting any kind of mass market for several years out,” Mr. Quong said. In general, lithium ion improves about 10 percent a year in terms of the amount of energy that can be stored in a given space, which is partly why consumers perceive batteries as being far behind other technologies.