Additional Comments - Bosch 0 684 400 703 Instructions D'emploi

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..3. What you should be aware of and observe when testing a starter battery
Battery testers provide a snapshot of
the battery's condition. Each charging or
discharging procedure influence the battery
condition. If a battery condition is located
within the good/unserviceable border, then
two successive tests on the same battery
which in the meantime has been charged
or discharged, may see the test fluctuate
between a good and unserviceable result.
steady-state
If the
over a lengthy period of time
assume that the battery has suffered previous
damage. A steady-state voltage below 12.4 V
olt points to a permanent battery charging
fault. The possible causes of such a lasting
charging fault are, e.g. a faulty generator
or current regulator, transition resistance
through loose or dirty battery terminal cable,
loose V-belt or the vehicle frequently driving
short distances.
i
If the test result indicates „Replace battery"
for batteries, which are not older than 3 years,
then we recommend always testing the cold-
start current, charge circuit as well as the
charge balance (e.g. deficient battery charge
through short-distance driving).
As long as the
set, reduction of the sulfate layer causes the
battery condition to change during charging.
That is to say, a
unserviceable" prior to charging may be as-
sessed as „Good" after charging.
1 689 979 868 (2005-10-07)
voltage lies below 12 Volt
then one can
sulfate layer of a battery
has not
battery assessed as „Battery
3.4 Additional comments
Hairline cracks in the connectors of the lead
plates:
Very fine cracks in the connectors of the lead
plates (hairline cracks) may under certain
circumstances be detected only when the
battery is under high current load (such as
a battery test under load). In a battery test
under no load (such as with battery tester)
such hairline cracks are not detected in bor-
derline cases. The occurrence of such cracks
is extremely rare in modern-day batteries.
Acid coating in the battery:
On lead-acid batteries with liquid electrolyte
an acid layer may under certain circum-
stances occur. The mechanical construction
of a lead-acid battery means that acid lifters
can only indicate the acid density of the upper
electrolyte layer. This means that determining
the charge condition of a battery with the acid
lifter entails a high degree of inaccuracy.
0 684 400 703
Robert Bosch GmbH