Roomba i4 Worn Battery

Robot reports charging error 8, 9 or 10; battery won't charge or won't hold charge.

• FM-13: Roomba i4 Charging Error 8 / 9 / 10 — Worn battery

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

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