Motorola IMPRES WPLN4111 Operating Instructions Manual page 15

charger from position "A" to position "B" reduces the frequency of the
discharge pulses. This has a minimal impact on the effectiveness of the
charger.
Towards the end of the rapid charge cycle ( STEADY RED indication),
the battery voltage exceeds the normal operating voltage of the radio.
The voltage returns to a normal level following the rapid charge mode
or when the battery is removed from the charger.
If the radio is turned on while the charger is in rapid charge mode, the
radio becomes temporarily inoperable. This condition can be cleared
by removing the radio from the charger and turning the radio off and on
again.
During the reconditioning process, the battery becomes fully dis-
charged. As a result, the radio may not function during reconditioning
mode.
In some cases, such as use near fluorescent lighting or electric motors,
a slight hum may be noticed in the receiving radio. If this occurs, mov-
ing the charger or repositioning the power cord should eliminate the
hum.
When troubleshooting, always observe the charge indicator – Refer to
Table 7 on page 9.
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