Alecto FR-58 Mode D'emploi page 71

WHEN USING NORMAL BATTERIES:
You can also use the FR-58 on normal (non-rechargeable) batteries.
Install these batteries the same way as indicated in the battery com-
partment.
Never place the radiophone with normal (non-rechargeable) batteries
in the charger and never connect an adapter to the radiophone. Nor-
mal batteries will be damaged when you try to charge them.
HEADSET OR EARPIECE:
The connection for a headset or earpiece is located on the right side
-
nection for the adapter. The batteries can be charged directly using
the adapter. When using this connection, the batteries may not be
charged longer than maximum 12 to 14 hours.
71