Opel 2016 Insignia Owner's Manual page 235

The vehicle battery is covered.
Remove the cover to replace the
battery. Lift up the cover at the rear
and unlatch it at the front.
When the battery is being replaced,
ensure that there are no open
ventilation holes in the vicinity of the
positive terminal. If a ventilation hole
is open in this area, it must be closed
off with a dummy cap, and the
ventilation in the vicinity of the
negative terminal must be opened.
Only use vehicle batteries that allow
the fuse box to be mounted above the
battery.
In vehicles with an AGM (Absorptive
Glass Mat) battery, make sure to
have the battery replaced with
another AGM battery.
An AGM battery can be identified by
the label on the battery. We
recommend the use of an original
Opel battery.
Note
Using an AGM vehicle battery
different from the original Opel
vehicle battery may result in a lower
performance.
We recommend that you have the
vehicle battery replaced by a
workshop.
Vehicle care
Stop-start system 3 160.
Charging the vehicle battery
9 Warning
On vehicles with stop-start
system, ensure that the charging
potential does not exceed
14.6 volts when using a battery
charger. Otherwise the battery
might be damaged.
Jump starting 3 265.
Warning label
233