2
OVER
2 Install or Replace Transmitter and Receiver Batteries
Purpose To ensure that your FreeStyle Navigator system has power to operate properly.
Start Do this procedure:
•ersttimeyouuseyourFreeStyleNavigatorsystem.
•WhenthereceiverdisplaystheLowBatterymessageandalarmandthebattery
icon appears on the screen.
•Whenthereceiversoundsanalarmanddisplaysthe“ReplaceTXBatterywith
Next Sensor” message.
Materials Gather these materials before you begin:
•2newAAAalkalinebatteriesforthereceiver.WerecommendEnergizer®Max®,
Energizer® e2® Titanium®, and Energizer® Industrial batteries. Other batteries
may not provide expected battery life.
•1SilverOxide357HCbatteryforthetransmitter.
•Acoin.
•YourFreeStyleNavigatorReceiver.
•YourFreeStyleNavigatorTransmitter.
Helpful Information
Caution:
It is important to use the correct type of batteries in the receiver, otherwise the battery life
may not be accurately monitored.
Important:
An alarm will sound and a battery icon will appear on the screen when your receiver batteries are •
running low. You must replace your receiver batteries the next time you replace your sensor. Make
sure to replace batteries before inserting your next sensor.
An alarm will sound and a message will appear on the screen when your transmitter battery is •
running low. You have approximately 4 days of battery power remaining when this rst happens.
Because you must insert a new sensor aer each battery replacement, you should replace the •
batteries just before you insert a new sensor. For example, if you drop your receiver and the
batteries fall out, you will have to insert a new sensor.
Aer installing the transmitter or receiver batteries, allow a couple of minutes for the system to •
recognize new batteries. You may then access the status of the battery life from the System menu in
your receiver (see Status Information in Section 10). If the batteries are new, the status screen will
show 75-100% as remaining battery life.
•If your receiver batteries are low and you fail to replace them, they may run out without a
warning and the receiver will neither display your glucose levels nor sound alarms.
•etransmitter’sbatterylifeisestimatedtobeupto30days.
•ereceiver’sbatterylifeisestimatedtobe60days.However,batterylifemaybeshorterthan60days
if your receiver’s alarms are set to vibrate, if you use backlighting frequently, or if the transmitter/
receiver connection is broken oen.
•Ifyouwillnotbeusingyourreceiverforanextendedperiodoftime,removethebatteriesfromthe
receiver to preserve battery life.
•Toavoiddrainingthereceiver’sbatteries,becarefulnottoaccidentallypressandholdthereceiver’s
buttons for a long period of time.
•Aerchangingthebatteries,makesurethatyoureconnectthetransmitterandreceivertoestablish
communication between them.
•Ifyouarereplacingbatteriesonboththetransmitterandreceiver,replacethebatteryinthe
transmitter rst.

Section 2 15

Install or Replace Transmitter and Receiver Batteries