Simon Willison’s Weblog

Battery Statistics. Run “ioreg -w0 -l | grep Capacity” on a MacBook or MacBook Pro to find out the DesignCapacity (original) and MaxCapacity (current) of your laptop’s battery.

Posted 27th July 2008 at 11:05 am

Recent articles

How Rob Pike got spammed with an AI slop "act of kindness" - 26th December 2025
A new way to extract detailed transcripts from Claude Code - 25th December 2025
Cooking with Claude - 23rd December 2025

battery 2 capacity 1 corstencurdt 1 macbook 3 macbookpro 3 power 3

Monthly briefing

Sponsor me for $10/month and get a curated email digest of the month's most important LLM developments.

Pay me to send you less!

Sponsor & subscribe