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HYUnDRI I

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ELECTRICAL
14-EE-001-1
nEW POSSIBILITIES. ~-------1--------------1

DATE

Technical Service Bulletin
AUGUST 2014
SUBJECT:

I

NUMBER

MODEL(S)
soNATA (YF/LF) ,
ELANTRA (UD/MD),
GENESIS SEDAN(DH)

ABSORBENT GLASS MAT (AGM) BATTERY

This TSB supersedes TSB 14-EE-001 to update the batteries installed in the 2015MY Sonata
(LF) vehicles.

Description:
Starting with the 2014 model year, there are two types of batteries installed on Hyundai vehicles :

Conventional Flooded (wet cell) type and Absorbent Glass Mat (AGM) type . Although the battery
external appearances are similar, the internal construction and characteristics of the batteries are
different. This difference impacts GR8 Battery Testing and Diagnostic Charging .

~

* IMPORTANT
•

The replacement battery must be the same type of battery originally installed
from the factory.

•

The correct battery type selection, either "Flooded" or "AGM", must be selected
during GR8 Battery Testing and Charging to ensure correct results.

•

Charging with an incorrect battery type selection will damage and shorten the life
of the battery.

•

Always check the battery specification label affixed on top of the battery before
working on the battery and be sure to select the appropriate battery type.

•

Always enter the "SAE CCA" value printed on the battery specification label for
the GR8 battery CCA rating.

Applicable Vehicles:
- 2014MY - Sonata (YF) 2.4L
- 2014MY - Elantra (UD/MD) 1.8L with Automatic Transmission
- 2015MY - Genesis Sedan (DH) 3.8L I 5.0L
- 2015MY - Sonata (LF)
Warranty Information:
Normal warranty applies.

Ci rculate To : General Manager, Service Manager, Parts Manager, Warranty Manager, Service
Advisors , Technicians , Body Shop Manager, Fleet Repair

SUBJECT:

ABSORBENT GLASS MAT (AGM) BATTERY
Specification Label Examples

2014 Sonata (YF) 2.4L, 2015 Sonata (LF) 2.0L
Turbo & 1 .6L AGM Battery

Sonata (YF) Flooded Battery

Hyundal Motor Mttnufacturfng
Alnbnma, LLC
Montgomery, AL J6105

TSB # : 14-EE-001-1

Page 2 of 4

SUBJECT:

ABSORBENT GLASS MAT (AGM) BATTERY

AGM Battery Testing/Charging:
When testing or charging an AGM battery using the Midtronics GR8 Diagnostic Battery
Tester/Charger, it is important to select the correct Battery Type in the setup menu. The GR8 will
configure the optimum voltage and current charge rates for the type of battery that is selected .

The AGM battery is sensitive to overcharging and heat. Severe overcharging can damage and may
deform the battery.
• The GR8 battery tester/charger has AGM battery settings and is the required tool for warranty .
• You must use a voltage regulated battery charger if GR8 is unavailable.
• Never allow the battery temperature to exceed 125°F during charging .
• Immediately stop charging any battery that becomes very hot or makes hissing noises.
Refer to TSB 14-EE-002 for more details on how to use the GR8 Battery Tester.
The latest Battery Application Guide can be found at:
http://www.hyu nda iflashd rive .com/storage/reference-materia l/pn-referencecha rts/battery app guide .pdf
AGM Battery General Information:
AGM batteries used in Hyundai vehicles are flat plate style and the case resembles that of a
conventional flooded battery.
The AGM battery uses a fiberglass mat separator that is wrapped around the positive plates and
holds the electrolyte in place with capillary action .
The battery cells consisting of the lead plates, electrolyte, and fiberglass mat are tightly packed into
the case partitions. This tight packing or compression holds the electrolyte absorbed in the glass
matting resulting in a battery that is spill proof, impact and vibration resistant. As a result, it has very
low internal resistance.
The lower internal resistance increases the voltage output, decreases charging time , and reduces
losses to heat as power flows through the battery.
In general , AGM batteries may provide a longer service life than conventional flooded batteries .

TSB #: 14-EE-001-1

Page 3 of 4

SUBJECT:

ABSORBENT GLASS MAT (AGM) BATTERY

Key benefits of AGM batteries:
• 3 times higher cycle capability
• Higher deep discharge capability
• Faster current delivery
• Faster charge capability
• Low self-discharge
• Maintenance Free
• Low I No gas output
• Spill proof

TSB #: 14-EE-001-1

Page 4 of 4