Aspire CF VV+ charger question

Hi, i bought the kit that comes with nautilus mini and CF VV+ Battery 1000mAh , the thing is yesterday ( first time charging) everything went ok( light indicator on battery flashed green/red then stayed green when fully charged). Well today i charged my battery again and the indicator on battery did tue usual flashes but when i came to pick up battery to go to work, the indicator on the charger was flashing green/ orange. Is there any reason for this?
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