Warranty
Service Problems
Overcharge
Modern car charging systems allow only a small current to flow into the battery when it is
fully charged. If there is a fault in the alternator, however, a much higher current will pass
through the battery all the time that the car is running. This current will cause the battery to
lose water rapidly, destroying the maintenance free characteristics of the battery, and will also
reduce the life of the battery by damaging the positive grids.
Deep Cycling
Modern charging systems keep the battery in a high state of charge while the car is running
under most operating conditions. However, the battery will discharge under abnormal
conditions or if the car is allowed to stand with a load on, for example, lights. On modern cars
when parked, there is normally a constant drain on the battery caused by such components as
the computer, alarm system, clock etc, and this will cause the battery to become
discharged. Depending on the vehicle, this can take weeks or months.
Vehicle batteries are designed to accept some cycles of discharge and recharge, but are not
designed for applications in which there are constant cycles of charge and discharge (deep
cycling). Leisure batteries have been designed for these types of application, and have a
special construction to enable them to be deep cycled on a continuing basis.
Continual deep cycling of vehicles batteries will cause failure as the positive active material
will gradually fall to the bottom of the battery, reducing the ability of the plates to store
electricity.
A large number of small black/brown particles in the electrolyte are a strong indication that
the battery has been deep cycled.
Sulphation
As explained earlier, sulphation is a normal part of the operation of a battery, and occurs
whenever a battery is discharged. When the battery is recharged, the sulphation (lead sulphate)
is changed back into active material. If battery is left flat for a period of time, this sulphation
slowly changes its form into one that cannot be changed back into active material on charging,
so, after charge, the battery will not return to give its original performance. If the sulphation
is bad enough, the car will not start. This is the problem normally referred to as sulphation.
Undercharge
Undercharge occurs if the battery is not receiving enough charge to return it to a full state-of-
charge; this will slowly cause sulphation. This fault can occur if the car is being used only
occasionally for short journeys, or for stop-start urban motoring. Undercharge will also occur
if the alternator voltage is in the region of 13.6 – 13.8 Volts.
Contact Us
YUASA BATTERY (M) SDN BHD
Lot 1385, Kawasan Perusahaan Tikam Batu
08600 Sungai Petani
Kedah Darul Aman
Tel No : 04-4388806/7/8
Fax No : 04-4388661
Contact Person:
Mr S C Ng
Email: [email protected]
HEAD OFFICE & FACTORY
Lot 1385, Kawasan Perusahaan
Tikam Batu,08600 Sungai Petani,
Kedah, Malaysia.
Tel : 04-4388806
Fax : 04-4388661
For any Suggestion or Opinion , please e-mail to
SALES OFFICE
We exist to serve our customers.We are here to listen to you - our existing customers and our
potential customers.
For enquiries on Sales, please send to:
No, 14,16, Jalan PSJ 11/3,
Bandar Sunway,
46150 Petaling Jaya,
Selangor Darul Ehsan.
Tel : 03-56338939 & 56336627
Fax : 03-56330416
Manufacturers’ warranties may not apply in all cases, depending on factors such as use of the
product, where the product was purchased, or who you purchased the product from. Please
review the warranty carefully, and contact the manufacturer if you have any questions.
