29
Battery Problems
NiCd batteries sometimes exhibit a symptom commonly called
memory effect. This is a term used to describe the perform-
ance of a battery that has regularly only been partially dis-
charged before recharging and seems to remember where it
previously stopped discharging. When the battery reaches this
discharge point, the voltage drops prematurely and the radio
gives a low battery indication. Consequently the battery only
operates with a reduced capacity. While NiMH batteries suffer
less from memory effect, it is recommended that both types of
battery be subjected to regular full discharge and charge cy-
cles, as outlined in Battery Use above.
A battery suffering from memory effect can often be restored
to full capacity by deep-discharging using a suitable charger
with an inbuilt discharge function (eg T3002). After discharge
the battery will be immediately fast charged to capacity. In
cases of severe memory effect it may take a number of dis-
charge and charge cycles to restore the battery to full capacity.
See your charger manual for full instructions. Alternatively
the battery can be returned to your dealer or service agent for
reconditioning using an approved battery analyser/recondi-
tioner.
The performance and lifetime of both types of batteries may
also be reduced by prolonged overcharging. NiMH batteries
are most prone to damage from overcharging, but NiCd batter-
ies can also have their life reduced.
Under certain environmental conditions, the terminals on the
battery may exhibit tarnishing. This in turn may lead to unre-
liable operation, either while in use or during charging. Typi-
cal symptoms might be that the radio turns itself off for no
apparent reason, or that it fails to charge properly. The tarnish
can be seen as a dull discolouration on the terminal, which
prevents it from connecting effectively to the radio or charger.
In such cases it is recommended that the tarnish be removed
by gently rubbing the affected terminals with a standard pencil
eraser.
Содержание T3010II
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