Volvo V70 Owner's Manual page 361

IMPORTANT
If the following instruction is not observed
then the Start/Stop function may temporar-
ily cease to work after the connection of an
external battery or battery charger:
•
The negative battery terminal on the
car's main battery must never be used
for connecting an external battery or
battery charger - only the car chassis
may be used as the grounding point.
See the section "Start assistance" - for a
description of how the cable clamps must
be attached.
NOTE
If the battery has become so discharged
that everything is "black" and in principle
the car does not have all the normal electri-
cal functions and the engine is subsequently
started using an external battery or battery
charger, then the Start/Stop function will be
activated. It will then be possible for the
engine to be auto-stopped but in the event
of an auto-stop the Start/Stop function may
fail to auto-start the engine due to inade-
quate capacity in the battery.
The battery must first be charged in order to
ensure a successful auto-start after an auto-
stop. At an outside temperature of +15 °C
the battery needs to be charged for at least
1 hour. At a lower outside temperature a
charging time of 3-4 hours is recom-
mended. The recommendation is that the
battery is charged using an external battery
charger.
If this is not possible then the recommen-
dation is to temporarily deactivate the
Start/Stop function until the battery has
been adequately recharged.
For more information about recharging the
battery, see the section "Battery" in the
chapter "Maintenance and service".
09 Maintenance and service
Battery
09
359