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3.2 Batteries
The 850EMT is powered by 6 AA NiMH batteries located
underneath a cover in the base of the unit.
How to t/replace the batteries
1 Remove the battery compartment cover located
on the base of the 850EMT (use a at bladed
screwdriver if desired).
2 Insert the NiMH AA sized batteries ensuring correct
polarity as marked on the PCB, or as shown in
Figure 4.
3 Ret the battery compartment cover by gently
pushing it down, hard enough such that it audibly
clicks into place.
Charging and Mains Use
The 850EMT has its own built-in charging circuit,
powered by an external adaptor.
Adaptors for mains and 12V car charging/operation are
included.
CAUTION
Battery Status:
• Fully charge the batteries for 4 hours
before using for the rst time
• Recharge the batteries as soon as the
Low Battery indicator appears
• Do not open the battery compartment
cover while the unit is switched on, or
charging
• Ensure that only Tyco specied Nickel
Metal Hydride rechargeable batteries are
used and fully charged before use.
Charging while the 850EMT is OFF
If the 850EMT is switched off and you
connect a charging adaptor the 850EMT will
automatically turn on while it is in the state of
charging.
If you disconnect the adaptor to stop charging
it, the 850EMT will switch off automatically.
Fig. 4: Batteries placed in the battery compartment
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