I charged my MacBook Air (Late 2010) up to 100% charge overnight however my battery died within 1 hour. Because of this I want to use the Apple Hardware Tool (AHT) to diagnose the issue.
My Mac is 4 years old and holds up to 70%-75% of its original capacity (6,700mAh).
I have tried holding the D key when booting my computer however it boots up normally.
How would I accesses the AHT?