Product Guide

MOD-10-1164
sepura
TETRA Terminals
Product Guide
October 28
th
2011
Page 17 of 36
Issue 5
© Sepura plc 2011
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 also displayed in red on
the STP8000 and STP8100 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.
Many professional and consumer products from cycle lamps to mobile phones and laptop
computers now use rechargeable lithium polymer cells because of their small size and high
energy density. When charged and used correctly these are reliable and safe. There are
some simple precautions that should be observed when charging and using Lithium polymer
packs. The precautions below apply to most/all Lithium polymer battery packs and chargers.
1. Properly designed Lithium polymer batteries and chargers contain effective protection
circuitry to safeguard the pack during charging and use, but in some very rare
circumstances of internal cell failure during charging, the protection circuits may be
ineffective and the pack may overheat. To minimise the chance of this causing further
damage, Lithium polymer battery chargers should be used in well ventilated areas away
from combustible material. For example, charging of a TETRA battery, mobile phone
battery or laptop battery should not be carried out with the battery and charger very near
to curtains, soft furnishings, paper or other combustible material.
2. Copy batteries are available for many products including TETRA radios made by Sepura.
These may be cheaper than approved batteries, but may not include protection features
used in the approved battery, so may be less safe and should not be used.
When the radio is switched on the battery is tested to check that it is an authentic Sepura
battery. This information is displayed on the Battery card in the Radio Information menu.
Please see section on Radio Information. If a non-Sepura battery is detected a warning
message is displayed (“Unidentified battery - charging suspended”) which may be cleared
by any key press and if charging of the battery is attempted no charging will occur.
3. Use only Sepura approved chargers for charging Sepura products and Sepura approved
batteries.
Non-approved chargers may incorrectly charge the battery, leading to premature failure,
or render the battery potentially unsafe.
4. Sepura batteries are designed to be rugged and to give good service. However, as is the
case for all Lithium polymer batteries, it is possible for extreme mechanical damage to
weaken the internal structure of the cells within the battery. Therefore, if the battery
casing shows signs of severe damage (not the minor scratches and bumps of everyday
use), or has been subjected to major mechanical abuse, the battery should be safely
discarded immediately.