Jeep Grand Cherokee 2016 Owner's Manual page 636

634 WHAT TO DO IN EMERGENCIES
6. Once the engine is started, remove the jumper cables
in the reverse sequence:
Disconnecting The Jumper Cables
1. Disconnect the negative (-) end of the jumper cable
from the remote negative (-) post of the discharged
vehicle.
2. Disconnect the opposite end of the negative (-) jumper
cable from the negative (-) post of the booster battery.
3. Disconnect the positive (+) end of the jumper cable
from the positive (+) post of the booster battery.
4. Disconnect the opposite end of the positive (+) jumper
cable from the remote positive (+) post of the dis-
charged vehicle.
5. Reinstall the protective cover over the remote positive
(+) post of the discharged vehicle.
If frequent jump-starting is required to start your vehicle
you should have the battery and charging system tested
at your authorized dealer.
CAUTION!
Accessories plugged into the vehicle power outlets
draw power from the vehicle's battery, even when not
in use (i.e., cellular devices, etc.). Eventually, if
plugged in long enough without engine operation,
the vehicle's battery will discharge sufficiently to
degrade battery life and/or prevent the engine from
starting.