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Eversense E3 CGM User Guide
Smart Transmitter Battery and
Charging
Q: How long does a fully charged smart transmitter
battery last?
A: A fully charged smart transmitter battery typically
lasts approximately 24 to 36 hours.
Q: How long does it take to charge a smart
transmitter?
A: It takes approximately 15 minutes to fully charge a
smart transmitter when plugged into a wall outlet.
It may take longer if charging via a computer USB
port or when the battery is empty.
Q: What happens if my smart transmitter battery is
completely drained?
A: No glucose readings will be displayed. Always charge
immediately when the smart transmitter battery is
completely drained.
Q: How do I check the smart transmitter battery status?
A: There are three ways to check battery status:
1. Tap Menu > About > My Transmitter. Scroll
down to the Battery Level line that indicates amount
of battery power left.
2. Check the battery symbol in the top right corner on
the MY GLUCOSE screen. A red battery icon
indicates the smart transmitter battery is empty.
3. Power ON the smart transmitter. Press and release
the smart transmitter power button. An orange
LED on the smart transmitter indicates low battery.
A green LED indicates the battery is at least 10%
charged.
Q: On the About > My Transmitter page, the battery
level shows 65% and then drops to 35%.
Why is that?
A: The rate battery levels discharge varies widely based
on use; the same battery model in two devices will not
discharge at the same rate. This is why we show battery
level indicators on this screen in large increments:
100%, 65%, 35%, 10% and 0%. Our testing shows that
the “Low Battery” alert is triggered consistently at the
point the smart transmitter still has approximately
2 hours of power left (at about the 10% indicator level).
It is important to charge your battery when you receive
the “Low Battery” alert.
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