Techno Line BC 250 Manuel D'utilisation page 25

Indication of
battery
charging
After the rechargeable battery is fully charged, "Full" sign (figure 5) will
show on the display and the user may take them out at this time. Or if
the rechargeable batteries are kept placing at the compartments, trickle
charging will start. The trickle charging current is around 10% duty cycle
of the charging current to keep the rechargeable batteries full.
(Figure 5)
Note :
The charging current of the rechargeable batteries depends on
battery condition. It cannot be selected by the user.
In case the power source terminates, the charger will reset. Once
the power source is back to normal, the batteries will be taken as
newly installed batteries in the charger.
Percentage
(Figure 4)
"Full" sign shows -The battery
is fully charged
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