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Check Condition Of Charge With Hydrometer

WARNING: This page is about a different car, the 2012 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
HYDROMETER REFERENCE CHART

Hydrometer indicator State of charge Corrective action
Green dot 65% or more Load test
Dark dot 65% or less Charge battery
Clear dot Low electrolyte Replace the battery.(1) (If cranking is difficult)
(1) Check electrical system before replacement.