Supplying power
The F3 can operate using either a power supply connected to its USB port (AC adapter, USB bus power or
mobile battery) or batteries.
A power supply connected to the USB port will be given priority over batteries.
Installing batteries
To run the F3 using batteries, install 2 AA batteries in the battery compartment. Open the cover on the
bottom by sliding it while pressing .
NOTE:
• Use only one type of battery (alkaline, NiMH or lithium) at a time.
• Set the type of battery used correctly so that the amount of remaining battery charge can be shown
accurately. (→ Setting the type of batteries used)
• If the battery charge becomes low, turn the power off immediately and install new batteries. The
remaining battery charge is always shown (on most screens) when operating on battery power.
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