Snap-On ControlTech Micro User Instructions page 28

 Battery Replacement
Note: When replacing battery, real-time-clock will maintain date and time for 20 minutes.
Note: Turn End Cap counter-clockwise to unscrew.
Battery should be installed in carrier prior to carrier installation into wrench.
Battery negative contact should be oriented towards carrier spring.
100% BATTERY
LEVEL
50% BATTERY
LEVEL
LOW BATTERY
REPLACE BATTERY
Note: When Replace Battery screen is displayed wrench will no longer operate until battery is replaced.
Only POWER button functions which immediately turns off wrench.
 Memory Indicators
DATA IN MEMORY
MEMORY FULL
MEMORY ERROR
LOW BATTERY
REPLACE BATTERY
Less than 1500 torque and angle records stored in memory.
1500 torque or angle records stored in memory. New records will
not be recorded until memory is cleared.
Memory read or write error.
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UNSCREW END CAP
INSERT NEW CELL
NEGATIVE (-) END
INTO END CAP