The Control Strip on the desktop indicates the battery charge and the rate at which the battery is being used.
PowerBook G3 Series batteries have level indicator lights that show whether the battery is fully charged, three-fourths charged, one-half charged, or one-fourth charged.
Before the lights will report levels correctly, the battery must be fully discharged and recharged to calibrate the battery. After this calibration, the lights will report charge levels properly.
To determine the actual battery charge, push in the level indicator button to activate the indicator lights.
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You can now recondition your old batteries at home and bring them back to 100 percent of their working condition. This guide will enable you to revive All NiCd batteries regardless of brand and battery volt. It will give you the required information on how to re-energize and revive your NiCd batteries through the RVD process, charging method and charging guidelines.