Calculated Industries 4400 - Manual (Page 43)

bATTERy
This model uses one (1) CR2016
battery (included). This should last
approximately 800 hours of actual use (1
year plus for most people). Should your
calculator display become very dim or
erratic, replace the battery.
Note: Please use caution when disposing of
your old batteries as they contain hazardous
chemicals.
Replacement batteries are available at
most discount or electronics stores. You
may also call Calculated Industries at
1-775-885-4900.
RESET
If your calculator should ever “lock up,”
press Reset – a small hole located
below the o key – to perform a total
reset.