SONOS MOVE (GEN 1) Not Holding Charge

Sonos Move Replacement Battery Kit

The Lithium-ion cells have likely reached their cycle limit (approximately 900 charges), resulting in chemical degradation and increased internal resistance. This causes a significant voltage drop when the speaker transitions from the 18V charging base to internal DC power, triggering the Battery Management System (BMS) to shut down to protect the circuitry. Replacing the battery module restores the necessary current capacity and voltage stability required for the speaker's peak power demands.

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Sonos Move Charging Base

If the charging rings on the base or the corresponding pins on the speaker are oxidized or mechanically fatigued, the unit may not receive a full saturation charge. This results in the battery never reaching its maximum state of charge (SoC), appearing to 'not hold' energy despite the cells being healthy. This is less likely if the speaker functions perfectly while docked.

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