Dataman S4 - Lithium Backup Battery

DATAMAN S4 MANUAL
<$IKEY;INFO>INFO<$&INFO> KEY 33
if the battery falls below 8.4 volts. Shutting-off is
orderly - there
is no harm to any device being programmed and
no loss of data, provided
S4 is recharged within a few
days.<$IBattery;Charging>
When the charger is ON, 650ma a.c flows into S4
and this will recharge
the battery in about an hour. A reasonable working
capacity will be
restored in much less time.
Deep discharges and fast recharges make the
battery last longer than
a trickle of charge which maintains a fully charged
battery all the
time.
<$ILithium Battery>Lithium Backup
Battery
Nickel Cadmium batteries lose capacity by self-
discharging at a rate
of 200% per year, according to the manufacturers.
That means that
a fully-charged Nicad today will have no charge at
all in 6 months'
time.
When S4 turns itself off because the battery
voltage is low,, there
is less than 1% capacity remaining. The RAM
data might only be supported
for a few days. For this reason, a Lithium battery
has been fitted
to support RAM and microprocessor data when the
Nicad loses its charge. The
Lithium cell does not have this self-discharge
problem. The Lithium