Support battery

The vehicle is equipped with a support battery that helps during the Start/Stop function's start sequence.

The battery is either a 12 V battery or, if the vehicle is a mild hybrid*, a 48 V battery that also enables regenerative braking while driving.

Location

P5-1617-S90/V90 Support battery location
The 12 V support battery is located in the engine compartment.
P5-1917-XC90-48V battery
Mild hybrid vehicles have a 48 V support battery located under the cargo compartment. The battery and the box around it may only be handled by authorized workshop personnel.

Maintenance of support battery

The support battery does not normally require more service than the start battery. If you have any questions or concerns, consult a workshop ‒ an authorized Volvo workshop is recommended.

 Important

If replacing the 12 V battery, make sure you replace it with a battery of the same size, cold start capacity and type as the original battery. Volvo recommends having an authorized Volvo workshop change batteries.

 Warning

Mild hybrid vehicles have components that work with 48 V voltage, which can be dangerous if handled incorrectly. Do not touch components that are not clearly described in the Owner's Manual.

  • Never use a 48 V support battery to jump-start the vehicle.
  • External electrical equipment may not under any circumstance be connected to the 48 V battery.
  • Only a workshop may replace or perform service on the 48 V battery – an authorized Volvo workshop is recommended.

Specifications for support battery

Battery typeAGM
Voltage (V)12
Cold start capacity1 - CCA2 (A)170
Dimensions, L×W×H150×90×130 mm (5.9×3.5×5.1 inches)
Capacity (Ah)10

If the vehicle is a mild hybrid*, the support battery is a 48 V lithium-ion battery.

  1. * Option/accessory.
  2. 1 According to EN standard.
  3. 2 Cold Cranking Amperes.