An Australian customs tariff for Macintosh Portable batteries states that
the following requirement must be met:
"Accumulators, lead acid, including gel and lead calcium types,
permanently sealed, rechargable, capacity NOT exceeding 11 amp-hours at
the 20-hour rate."
What is meant by the 20-hour rate, and do our Portable batteries fall
within this rate?
The 20-hour rate is an indicator of battery capacity, a measure of how
much current is required to drain the battery over a 20-hour period.
Macintosh Portable batteries carry a rating of 5.4 amp-hours at 20 hours,
so they fall within this guideline.