Dataman S4 - Manual (Page 29)

DATAMAN S4 MANUAL
INFO KEY 29
If the charger is attached and switched on, you
will see the battery voltage rise as the battery
charges. When the battery is fully charged you
will see the temperature rise and the charger
will switch-off when the rise equals 5°C.
One CHARGE is enough. It is possible to
raise the battery temperature by charging
three or four times in succession, which
raises temperature by 5°C each time. This
does not put any extra charge in the battery
or achieve anything useful.
To terminate INFO mode, press ESCape.
Automatic Battery Charging
When S4 is turned on, it charges the battery if
the "FUEL GAUGE" shows less than 75% full.
The charger will replenish the battery in less
than an hour. There is a temperature sensor in
contact with the battery. When it sees a 5°C
rise, the charge current turns off. Charging is
thus perfectly safe and S4 may be used
normally whilst being charged.
The internal circuitry prevents the batteries
overcharging. While capacity remains they are
capable of absorbing high currents, but when
fully charged the current is not stored - it is
dissipated as heat. S4 monitors battery
temperature, looking for a 5°C rise at which
point the high current is turned off. S4 remains
on when charging - but will turn itself off
automatically when the job is done. You can
safely leave S4 alone when charging or
continue to use it. If the message HEAT
appears when charge is requested, it means