Freedom Scientific Ruby User Manual page 3

Read Me First

Before using RUBY for the first time, you must charge the four AAA NiMH
(1000 mAh) batteries. These batteries are included. A full charge takes
approximately 2 hours. Refer to Battery LED Descriptions on page 2 for
battery status explanations. You can also use four AAA disposable alkaline
batteries to operate the unit.

Do not mix NiMH batteries with alkaline batteries. Replace all batteries of
the same chemistry at the same time. Do not mix new batteries with old
batteries. Replace NiMH batteries with 1000 mAh NiMH batteries.
Failure to follow this precaution can lead to battery failure or leakage. The
risk of explosion is possible if batteries are replaced with an incorrect type.

For a basic overview of RUBY, review the information in this guide first.
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