The car is equipped with a hybrid battery for electric motor operation - a maintenance-free rechargeable Lithium-ion type battery.
The car cannot be started if the hybrid battery is discharged.
If both the starter battery and the hybrid battery are discharged then both batteries must be charged. In such a case, charging only the hybrid battery first is not possible.
In order for the hybrid battery to be charged the starter battery must have a certain state of charge.
The hybrid battery must only be replaced by a workshop - an authorised Volvo workshop is recommended.
The hybrid battery's cooling system has a separate expansion tank.
The hybrid battery's coolant must only be topped up by a workshop - an authorised Volvo workshop is recommended.