Volvo 2008 V70 Owner's Manual page 226

WARNING
Connect and disconnect the positive and negative cables in the correct sequence.
239
06 Maintenance and specifications
Battery
Removal
Switch off the ignition and wait at least 5 minutes before disconnecting the battery so that all information in the
vehicle's electrical system can be stored in the control modules.
Open the clips on the front cover and remove the cover.
Release the rubber moulding so that the rear cover is free.
Remove the rear cover by pulling it away.
Detach the black negative cable
Detach the red positive cable
Detach the ventilation hose
Loosen the screw holding the battery clamp.
Move the battery to the side and lift it up.
WARNING
PROPOSITION 65 WARNING!
Battery posts, terminals, and related accessories contain lead and lead compounds, chemicals known to the state of
California to cause cancer and reproductive harm. Wash hands after handling.
Installation
1. Lower the battery into the battery box.
2. Move the battery inward and to the side until it reaches the rear edge of the box.
3. Screw in the battery with the screw in the clamp.