Metal chips, grinding dust, steel wool, foil, or another dry conductive buildup is visible in the battery cavity, around contacts, or at ventilation slots. No liquid or active smoke, spark, burning, or melting is present.

Metal chips, grinding dust, steel wool, foil, or another dry 1. Unplug the charger and remove the battery before a conductive particle

• FM-15: Fm 4 6

• root cause analysis
• tools needed
• step-by-step repair procedure
• diagrams
• exploded views
• post-repair checks

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