IROBOT ROOMBA S9 Battery Not Charging
| CONF | DIAGNOSIS | ACTION |
|---|---|---|
|
85%
CONF
|
Lithium-Ion Battery Pack
Lithium-ion cells undergo chemical degradation through electrolyte depletion and SEI layer thickening over hundreds of charge cycles. This increases internal resistance to a threshold where the Charging Control Unit (CCU) rejects the battery to prevent thermal instability. Replacing the pack restores the chemical capacity necessary to accept the charging current.
SKU: 4655994
|
|
|
10%
CONF
|
Clean Base Charging Station
The charging base contains an AC-to-DC rectification circuit that can fail due to electrolytic capacitor aging or voltage regulator breakdown. If the base cannot maintain the required 20-21V output under load, the robot will detect the voltage drop and cease the charging handshake. Replacing the base ensures a stable power supply is delivered to the robot's contacts.
SKU: 4701258
|
|
|
5%
CONF
|
Main Logic Board
The charging circuit on the mainboard uses power MOSFETs to gate current into the battery pack. These components can fail in an 'open' state due to thermal cycling or current surges during docking maneuvers. When this occurs, the physical connection to the dock is established, but the electrical path to the battery is severed at the board level.
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DIY Repair Guide
Watch exactly how to replace the Lithium-Ion Battery Pack.
// NOTICE:
This report is generated by an Agentic AI Engineer utilizing probabilistic modeling.
PartSniper is an automated parts recommender service. AI-generated results may not be correct. This data is not a substitute for professional engineering advice or manual inspection. Always verify part compatibility and disconnect power before any repair. PartSniper is not liable for inaccuracies, injury, or damage.