Macbook Battery Calibration - how empty d… - Apple Community
Calibrating Your MacBook, Air, or Pro Battery
What is the officially 'best' way to keep a MacBook's battery healthy and long-lasting? Is it better to charge to full and unplug it, or charge only when necessary? - Quora
How To Calibrate a Mac Laptop's Power System - NewerTech
2008 MacBook Review: Better than a modern MacBook in many ways
How To Calibrate a Mac Laptop's Power System - NewerTech
MacBook Pro 15" Unibody Late 2008 and Early 2009 Battery Connector Replacement - iFixit Repair Guide
BU-603: How to Calibrate a “Smart” Battery - Battery University