Battery Operation/Replacement - HP -01 Owner's Manual

Maintenance and Service 74
Shock Resistance: The HP-01 has been designed and tested to withstand shocks beyond
those encountered in normal use with only minor changes in accuracy. Excessive or cumulative
shocks may be, cause for recalibration.
Water Protection: Although the HP-01 is not intended for underwater use, it has been
designed and tested to withstand immersion in water at 10 meters (32.8 feet) for 5 minutes
at 25°C provided the HP-01 case and window are intact.
BATTERY OPERATION/REPLACEMENT: Inside your HP-01 are three watch batteries.
Two power the display, and the third powers the internal circuitry.
Battery life depends on battery capacity and on the extent of display use. Expected life of the
circuit battery is 6 to 12 months. Expected life of the display batteries is 3 to 6 months.
As your display batteries wear down, the numbers on the display become dim. If you notice
incomplete numbers or decreased intensity of illumination, it is time to change the two display
batteries.
Your dealer will replace the batteries for you, or you may purchase an optional battery set
with the necessary tool to replace them yourself. Replacement battery sets are available from