EXFO FTB-1 - Manual (Page 198)

Maintenance
188 FTB-1
Replacing Batteries
Replacing Batteries
Your unit uses batteries with built-in protection that have been especially
designed for EXFO. For this reason, you can only replace the main battery
with a battery designed for your FTB-1.
You can purchase new batteries and empty battery compartments (also
known as “battery covers”) from EXFO.
The main lithium-ion battery is offered in two sizes:

A four-cell (small) battery

An eight-cell (large) battery
Note: Since the battery must fit in the battery compartment, these compartments
are also offered in two sizes.
Note: Batteries and battery compartments are sold separately, which means you
can purchase extra batteries to use with a battery compartment that you
already have. The size of the battery must match the size of the
compartment.
To remove the main battery:
1. Turn off the unit.
2. Remove the battery compartment (located next to the module) as
follows:
C
AUTION
Use Li-Ion batteries of the same type and model only. Use of other
batteries may damage your unit and compromise your safety.
W
ARNING
Do not throw batteries into fire or water and do not short-circuit
the battery’s electrical contacts. Do not disassemble.