Technical data

FAQs
26
FAQs
27
If you install additional electrical equipment in the
vehicle, such as amplifiers, navigation systems,
electrical window openers, etc., be sure to also install
a battery with a larger capacity. The original size of
the battery suggested by the vehicle manufacturer
corresponds to the original equipment of the car.
Additional electrical equipment will use up more
energy from the battery and this will result in a
permanent state of low charge if you do not install
a larger battery. A permanent state of low charge
will result in the reduction of the service life of your
battery.
21 It doesn’t seem possible to recharge the discharged
battery.
If a battery is stored for a prolonged period in a state of
low charge, the grids experience sulphation, a process
in which the active material is transformed into white
sulphuric acid (an irreversible state). The longer it is left
in this state, the more difficult it becomes to recharge
the battery. So, recharge any discharged battery as
soon as possible.
A battery with deep discharge should be charged with
1/20 of the capacity of the battery. If it does not recharge
under these conditions, you will need to replace it.
Any attempt to charge it using a larger current will
probably damage it and result in its complete discharge.
Recharging a battery with deep discharge using a high-
power charger will, at best, have no effect or worse
cause permanent damage to the battery.
22 What kind of problems could arise during use?
Low charge level: This is caused by a defective u
alternator, extremely short journeys or an excess
of electrical equipment. Dirty terminals can cause
a loss of current. The battery is not fully charged
and parts of the active material have become
inactive (sulphation). The consequences are a loss
of capacity and reduced starting power.
Overcharging: This is caused by a defective voltage u
regulator. Overcharging results in high water
consumption, extreme electrode corrosion and
severe damage to the battery.
Strong cyclical use: This is caused by numerous u
discharging and recharging deep cycles. Usually,
these charges do not occur under normal
circumstances, unless the starter battery is
frequently activated in congested traffic with lots
of stop-start activity, or when it is used for other
purposes, for example in taxis, to operate loading
platforms on trucks or as a traction battery (there
are special batteries for such applications).
Wrong size of battery: Choosing a battery with u
an inadequate capacity for a vehicle results in a
larger cyclical charge and damage to the battery.
Such damage also results from excessive power
consumption by electrical equipment installed
subsequently (for example, sound systems,
portable telephones, stationary heating).
23 How can I do a simple check for poor battery
operation?
Perform the following list of steps, one at a time, to
check the state of the battery.
Check the outer surfaces of the battery. 1. Damage
(for example, cracks) to the external surface of the
battery can cause leakage of electrolyte which, in
turn, results in corrosion of the car. A dirty battery
surface can cause discharge. So, keep it as clean
as possible. Use only a damp anti-static cloth for
cleaning.
Check the charge indicator. 2. Bosch S5 and S6
starter batteries are fitted with a charge indicator.
It is a fast and convenient way to get a first
impression on the state of charge of the battery.
Measuring the voltage (OCV).3. Let the car engine
rest for about one hour after switching it off before
measuring the voltage. Based on the measured
value of the voltage, you can work out the state
of charge. The voltage of your battery should be
between 12.2V and 12.8V. A voltage that is lower
or higher may be an indication that there is a
fault in the electrical system of the car or that
the battery is damaged. In these cases, have the
battery checked at an authorized workshop.
Check the battery using a professional battery 4.
testing instrument. Check with the nearest
authorised dealer for more information concerning
the state of the battery.
24 What are some of the causes of battery discharge in
a car?
Forgetting to turn off electrical equipment, for u
example, fog lights or improperly shut doors that
keep the dome light switched on.
The electricity load exceeds the capacity of the u
vehicle’s alternator. For example, when the car is
stopped the generator supplies only 10% to 30%
of its capacity. Discharge may occur if there is an
excessive demand for electrical power at such a
time.
An increase in the number of electrical accessories u
in the car. The capacity of the generators may not
be adequate for feeding all the accessories.
Long journey times at low speed or electrical u
overcharging during night trips. For example,
driving in urban traffic, proceeding with many
stops and starts, or on congested roads, together
with an excessive use of the air conditioning or
other electrical components.
Problems with the voltage regulator or with u
electrical components.
Loose connections between the terminals and the u
cables.
Leaving the vehicle parked for long periods of u
time.
Poor operation of the starting device (ignition), u
requiring excessive ignition.
Loose fan belts, which reduces the capacity of the u
generator.
The wearing of wire insulations in older cars u
caused by abrasion, which can cause the current
to leak to other parts of the car.
Spent batteries. u
25 What should I do with my old or damaged battery?
Car batteries contain lead and sulphuric acid. These
materials are hazardous if disposed of in regular
refuse or thrown out in the open. Most of the battery
and its materials are recyclable. To help protect the
environment, adhere to the following instructions:
Never dispose of spent batteries or their u
components in domestic refuse.
Stores, manufacturers, importers and scrap u
dealers take spent batteries and send them on
to secondary foundries for recycling. When you
buy a new battery, hand in the spent one to the
workshop.
If a battery is destroyed or damaged, the leaked u
electrolyte, lead plates and separators should not
be disposed of in domestic refuse. Place these
materials in an acid-resistant box and return
them as you would do with any other spent or
undamaged battery.
The electrolyte and diluted sulphuric acid should u
never be emptied [by someone] without specific
technical knowledge. Never allow the electrolyte
to get into the sewer system, the soil or the water
table.
26 Can the batteries be recycled?
At present, lead-acid batteries are used in practically
all vehicles.
How is the battery recycled?
The acid of the battery is recycled by neutralising u
it in water or by converting it into sodium-sulphate
or powdered detergent, or by using it in glass and
textile production.
The plastic is recycled by cleaning up the battery u
container, melting it down and transforming it into
plastic pellets which will be used once again for
manufacturing batteries.
The lead, which accounts for 50% of each battery, u
is melted down into bars and refined. The lead
retains all its characteristics after having been
refined and can be used for the production of new
batteries.