Cadillac ELR 2014 Owner's Manual page 284

10-24 Vehicle Care
When using a 12-volt battery
charger on the 12-volt AGM battery,
some chargers have an AGM
battery setting on the charger.
If available, use the AGM setting on
the charger, to limit charge voltage
to 14.8 volts. Follow the charger
manufacturer's instructions.
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.
Vehicle Storage
Warning
12 volt batteries have acid that
can burn you and gas that can
explode. You can be badly hurt if
you are not careful. See Jump
Warning (Continued)
Starting on page 10-70 for tips on
working around a battery without
getting hurt.
Up to four weeks
Plug in the high voltage battery
charge cord if temperatures will
exceed 35°C (95°F) and keep
the 12-volt battery cables
connected.
Four weeks to 12 months
Discharge the high voltage
battery until two or three bars
remain on the battery range
indicator (Battery symbol) on the
instrument cluster.
Do not plug in the high voltage
battery charge cord.
Remove the black negative ( )
cable from the 12-volt battery
and attach a trickle charger to
the battery terminals or keep the
12-volt battery cables connected
(Continued)
and trickle charge from the
underhood remote positive (+)
and negative ( ) terminals. See
Jump Starting on page 10-70 for
the location of these terminals.
Caution
The vehicle is equipped with an
AGM/VRLA 12-volt battery, which
can be damaged by using the
incorrect type of trickle charger.
An AGM/VRLA-compatible
charger must be used, with the
appropriate setting selected.
Follow the trickle charger
manufacturer instructions.
After the battery cable is
reconnected, it is possible that the
vehicle may not operate in Electric
Mode. If this happens, the high
voltage battery may need to be
charged.