MOD-10-1164
sepura
TETRA Terminals
Product Guide
14-09-2012
Page 23 of 46
Issue 11
© Sepura plc 2012
The battery includes circuitry to protect against damage caused by accidental shorting
of the contacts. Once the battery has protected itself, it will not operate again reliably
until it has been removed from the radio and been fully re-charged. If the battery is not
fully re-charged the battery meter and time-to-charge indication on the radio may give
an inaccurate reading.
The amount of charge in a battery, shown as a percentage, is displayed on the Battery card in
the Radio Information menu. Please see section on Radio Information in the Sepura TETRA
Radios User Guide.
Low Battery Warning
The radio warns the user when less than 12% of the charge is left by displaying the Low
Battery Icon on the top line of the screen and repeatedly flashing the red LED for one second
at one second intervals.
The Battery Level indicator at the left hand side of the screen is
displayed in red on the STP9000, STP9100, STP8000, STP8100
and STP8X radios.
This screen shot shows the display of the Low Battery Icon on the
STP9200 and STP8200 radios.
When the battery is flat there is an audible alert just before the radio switches off.
As with all batteries, charging cycles reduce the cell capacity. The battery is specified to have
retained a nominal 80% of its original fully charged capacity after 500 charge cycles. Charging
should be conducted using a Sepura approved charger.
Batteries have a finite life; they deteriorate if they are not charged on a periodic basis.
Batteries should not be left for more than 6 months without recharging as the cells will
deteriorate and the batteries will not be recoverable.
