User's Guide

Ensure that batteries are fully charged at the start of a shift.
Decrease the amount of time the backlight stays lit between key presses (see Adjusting the
backlight on page31).
Keep your speaker audio volume to a minimum (see Adjusting the volume on page28).
Reduce the length of time the radio is transmitting and keep DMOor telephone type calls to a
minimum because they cause higher current consumption.
Shorten the GPS reporting intervals if enabled (see Reporting options on page105).
Charging the battery
Your radio is powered by a rechargeable battery. The battery may be recharged many times but it
will eventually need replacing to ensure continuous maximum performance from your radio.
First time battery charging
New batteries (Standard battery part no. 300-01852 and High Capacity battery part no. 300-01853)
are supplied in 'storage mode' which means they have a minimum amount of charge for storage
purposes. Before using a new battery for the first time it must be fully charged to reactivate it. If the
battery is used before it is reactivated (fully charged) the radio may not power on, or may indicate a
low battery status icon or low level of charge.
Battery chargers
Only use Sepura approved battery chargers. Use of non-approved chargers may not fully charge the
battery or damage it. Always read the user documentation supplied with the charger for additional
safety instructions and how to use it.
Charging methods
The radio may be powered on or off during charging.
Attach the Charger cable to the connector at the base of the radio or place the radio with battery
attached into a charging dock. During charging, the tri-coloured LED on the radio indicates the
charging progress and the charging icon appears on the status line, providing there is sufficient
charge in the battery to support this function.
Status LED Description
Flashing Orange Battery temperature is either too hot or cold to commence charging.
Solid Orange Charging in progress.
Solid Green Charging complete.
Solid Red Battery has failed to charge and may be not be chargeable. Contact your
service provider or Sepura.
The battery may be charged separately from the radio using a battery-only charger.
4 SC21 Series hand-portable radio