Jabbla Tellus 4, Manual

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Tellus 4
22
6.1 Replacing battery 2
Tellus can be equipped with a second battery. This is a hot swappable battery.
This means that you do not need to switch off the Tellus to replace the 2nd
battery. The 2nd internal battery is located behind the battery cover. Only open
the battery cover when necessary.
Press the two lids (1) of the battery cover downwards and slide the battery cover
away from the Tellus (2).
The battery and a release switch are visible now.
The indicator
flashes orange
The battery state of charge is being checked (for four seconds after
battery installation).
The indicator
flashes red The battery is faulty.
The indicator is
not lit
There is no battery installed.