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M555 Lithium Battery Replacement
The internal lithium battery is a technician replaceable item.
Caution: the lithium battery used in this device may present a re or chemical burn hazard if
mistreated. Do not recharge, disassemble, heat above 100°C (212°F) or incinerate. Replace
battery with Panasonic, Part No. BR-2/3A or Micro-Comm Part No. BAT-004-3 only. Use of
another battery may present a risk of re or explosion.
To replace the battery, remove power to the unit. Un-plug all of the terminal blocks and com-
munications cables. Un-mount the unit and place it on a clean working surface. Remove the
eight screws on the sides of the unit and lift the top cover from the mounting base. The battery
is clipped into the battery holder labeled J8. Use a small blade screwdriver to pry the battery
clip to the side and up. Then pry on the other side to fully remove the battery clip. At this point
the battery is held in place by the battery holder contact spring force and it is simple to remove
the battery with your ngers. Place a new battery in the battery holder, matching the orienta-
tion of the “+” and “-“ markings on the battery to the battery holder. Replace the battery clip
by pressing it into place. Mate the top cover to the mounting base and re-install the eight
screws. Re-mount the unit and plug all of the cables back into the unit.
Dispose of the battery properly. Keep away from children. Do not disassemble and do not dis-
pose of in re.
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