The Apple Charging Situation

The short version

Apple devices are telling a different story than the chargers in the box. Many Macs and iPhones cap how much power they’ll take, so a 140W brick finishes at the same speed as a basic 20W adapter on some models. Pay top dollar for a Pro and get a half-speed charger? Frustrating, yes — it feels like buying a sports car and getting a bicycle pump.

What’s shipping (and what that means)

It has been reported that several models ship with adapters well below their fast‑charge thresholds: some Air models and the 17e are limited to 20W, Airs that can fast‑charge at 70W now ship with 40W units, and the Neo ships with 20W on a 30W‑capable machine. It has also been reported that the Pro, priced at $1,299, ships with what amounts to a half‑speed charger. As of macOS Tahoe 26.4, it has been reported that the OS will even label an undersized adapter as “Slow Charger” in the battery menu — an explicit, orange shame tag for underperforming chargers.

Battery math and control

Here’s the kicker: Apple deliberately limits charging at the device level to protect battery longevity. It has been reported that “every 10% Apple holds back roughly doubles battery lifespan.” Above about 80% charge the cell works hardest, chemistry gets stressed and wear accelerates — so the company throttles charge to trade peak speed for long‑term health. USB‑C makes this easier: the device, not the brick, requests the wattage. You can’t overfeed an iPhone; it simply won’t draw more than it wants.

What you can do (and the takeaway)

Practical takeaway: save your high‑wattage bricks for the devices that can actually use them and check the battery menu if you think charging is sluggish. Yes, hundreds of millions of 5W chargers still lurk in drawers — Apple shipped a 5W adapter with iPhones from 2007 to 2019 — and many are USB‑A, so you’ll need a USB‑A to USB‑C cable for anything newer. Annoying? Absolutely. Dangerous? Not usually. The system is working as designed — prioritizing battery lifespan over headline charging numbers.

Sources: randsinrepose.com, Lobsters