Why This Is the No. 1 iPhone Battery Killer | WSJ

Heat is enemy No.1 for smartphone batteries and can lead to irreversible damage. But at what temperature will you get a warning? And what can you do to limit the impact of the hot sun?

WSJ’s Joanna Stern heated up an Apple iPhone 13 Pro and a Samsung Galaxy S to get the answers.

0:00 Phone temperatures
1:00 Why heat is bad for batteries
1:33 Tests: how hot is too hot?
3:27 What you can do to preserve your battery

Tech Things With Joanna Stern
Everything is now a tech thing. In creative and humorous videos, WSJ senior personal tech columnist Joanna Stern explains and reviews the products, services and trends that are changing our world.

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