Opel Rocks-E 2021 Owner's Manual page 29

When the positive terminal is
reconnected, reconnect the negative
terminal (left-hand side).
Reconnect a terminal as follows:
1. Insert the nut horizontally into the
terminal's square housing.
2. Place the clamp (2) on top of the
terminal.
3. Insert the screw (1) into the
terminal and nut and screw tight.
Starting using another battery
If the vehicle battery is flat, the electric
motor can be started using a backup
battery (either external or from
another vehicle) and jump leads or
using a battery booster.
9 Warning
● Never start the electric motor
by connecting a battery
charger.
● Never use a 24 V or higher
battery booster.
● Check beforehand that the
backup battery has a nominal
voltage of 12 V and a capacity
at least equal to that of the
discharged battery.
● The two vehicles must not be in
contact with each other.
● Disconnect or turn off all
electrical devices in both
vehicles (portable devices,
wipers, lights, etc.).
● Do not disconnect the positive
terminal while the electric
motor is switched on.
1. Connect the red cable to the
positive terminal of the flat vehicle
battery (2), then to the positive
terminal of the backup battery (1)
or booster.
2. Connect one end of the black
cable to the negative terminal of
the backup battery (3) or the
booster (or to an earth point on the
assisting vehicle).
3. Connect the other end of the black
cable to the negative terminal of
the flat vehicle battery (4).
4. When connected to an assisting
vehicle, start the engine on the
assisting vehicle and leave it
running for a few minutes.
5. Turn the ignition key to start the
disabled vehicle.
The high voltage battery takes
over the supply to the 12 V circuit.
6. Wait for the assisting vehicle to
return to idle.
7. Disconnect the jump leads in
reverse order.
8. Leave the vehicle switched on for
at least 30 minutes to allow the
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