WARNING
To prevent SERIOUS INJURY or DEATH to you or bystanders, always follow these precautions when working near or handling the battery:
Always read and
follow instructions carefully when handling a battery.
Wear eye protection
designed to protect the eyes from acid splashes.
Keep all flames,
sparks, or smoking materials away from the battery.
Hydrogen is always
present in battery cells, is highly combustible, and may explode if ignited.
Keep batteries out
of reach of children.
WARNING Batteries
contain sulfuric acid which is highly corrosive. Do not allow acid to contact your
eyes, skin or clothing.
If acid gets into your eyes, flush your eyes with clean water for at least 15 minutes and get immediate medical attention. If acid gets on your skin, thoroughly wash the area. If you feel pain or a burning sensation, get medical attention immediately.
WARNING
CALIFORNIA PROPOSITION 65 WARNING
Battery posts, terminals, and related accessories contain lead and lead compounds, chemicals known to the State of California to cause cancer, birth defects and reproductive harm. Batteries also contain other chemicals known to the State of California to cause cancer. Wash hands after handling.
NOTICE

WARNING
Always follow these instructions when recharging your vehicle's battery to avoid the risk of SERIOUS INJURY or DEATH from explosions or acid burns:
By jump starting
After a jump start from a good battery, drive the vehicle for 20-30 minutes before it is shutoff. The vehicle may not restart if you shut it off before the battery had a chance to adequately recharge. See "Jump Starting" in chapter 6 for more information on jump starting procedures.
Information
An inappropriately disposed battery can be harmful to the environment and human health.
Dispose the battery according to your local law(s) or regulation.
Reset Features
The following items may need to be reset after the battery has been discharged or the battery has been disconnected.
Hyundai Elantra AD (2016-2020) Service Manual: Battery Sensor Description and Operation
Description
Vehicles have many control units that use more electricity.
These units control their own system based on information from diverse
sensors. It is important to have a stable power supply as there diverse
sensors giving a variety of information. Battery sensor is mounted on
ba ...
Hyundai Elantra AD (2016-2020) Service Manual: Dynamic Damper Repair procedures
Removal
1.
Remove the front driveshaft.
(Refer to Driveshaft Assembly - "Front Driveshaft")
2.
Remove the TJ joint assembly.
(Refer to Driveshaft Assembly - "TJ Joint")
3.
Remove the remove the both side of band (B) of the dynamic damper (A).
4.
Fix the driveshaft (A) with a vice ...