Step 6: Determine how much of the maximum capacity your battery is retaining.
Divide the "Charge Remaining" number by the "Full charge capacity" number, then multiply by 100. This number is the percentage of the original capacity that your battery is currently capable of retaining. NewerTech NuPower® Batteries are considered within normal operating parameters if they retain 80% or more of their original capacity when tested in this manner.
If the battery is retaining less than 80% of its original capacity when tested, a printed copy of the "Power" section of your Apple System Profiler report is required to set up a return. (Note when printing: Be sure to check the option to print just the "Selected section" and not the "Entire document". This will reduce the paper used from
several hundred pages to a single one.)