Apple’s switch from Intel to its own M1 Pro and M1 Max chips pays off big time in battery life. But how much extra juice do you really get with the new MacBook Pro laptops? Does it really last the 21 hours Apple claims? WSJ’s Joanna Stern tested it all. Photo illustration: Adele Morgan / The Wall Street Journal Personal Technology With Joanna Stern Technology is overwhelming and making decisions about what gadget to buy is harder than ever. WSJ personal tech columnist Joanna Stern makes it all a bit easier in her lively and informative videos. More from the Wall Street Journal: Visit WSJ.com: http://www.wsj.com/ Visit the WSJ Video Center: https://wsj.com/video On Facebook: https://www.facebook.com/pg/wsj/videos/ On Twitter: https://twitter.com/WSJ On Snapchat: https://on.wsj.com/2ratjSM #WSJ #MacbookPro #Apple