Hyundai TUCSON Hybrid Owner's Manual page 671

Maintenance
The negative battery cable must
be removed first and installed last
when the battery is disconnected.
Disconnect the battery charger in the
following order:
1. Turn off the battery charger main
switch.
2. Unhook the negative clamp from
the negative battery terminal.
3. Unhook the positive clamp from
the positive battery terminal.
We recommend that you use
batteries for replacement from an
authorized HYUNDAI dealer.
Hybrid vehicle
The 12V auxiliary battery of the vehicle
is integrated within the high-voltage
battery. The high-voltage battery is
located under the 2nd row seat cushion.
For battery related servicing, we
recommend that the system be serviced
by an authorized HYUNDAI dealer.
9-38
12V auxiliary battery connector
Disconnect the 12V auxiliary battery
connector located inside the engine
room compartment to shut down the
power of the 12V auxiliary battery.
Connect the 12V auxiliary battery
connector again after the battery related
maintenance is finished.
CAUTION
The efficiency of the battery
decreases during low temperature.
If the vehicle is not used for the
extended period of time, park the
vehicle indoors if possible.
Always keep the battery charged to
the full capacity. The battery case
may damage due to freezing if the
battery capacity is low.
Do not install unauthorized electrical
devices (e.g. lamps, dashcam, etc.)
to a vehicle. It may discharge the
battery.
ONX4H092026L