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Introduction
Important Notes about Battery Use
Four AA alkaline batteries provide the device with approximately 60 hours of continuous operation.
The rechargeable NiMH battery pack provides approximately 40 hours of continuous operation.
Clock/calendar settings can significantly affect battery storage life. Batteries drain during storage,
but they drain much more quickly when the clock/calendar functions are set. Refer to “Clock and
Calendar Settings” for more information.
When Using AA Batteries
• If the clock/calendar is not set when the unit is stored, alkaline batteries will require replacement
in 10-12 months if the unit has not been used.
• If the clock/calendar is set when the unit is stored and if the unit has not been used, alkaline
batteries will require replacement in about 6 weeks.
• Using the oximeter will shorten the required replacement time.
When Using the Rechargeable NiMH Battery Pack
• If the clock/calendar is not set when the unit is stored, and if the unit has not been used, the
rechargeable NiMH battery pack will need recharging at least every 2 months.
• If the clock/calendar is set when the unit is stored, and if the unit has not been used, the
rechargeable NiMH battery pack will need recharging at least every 3 weeks.
• Using the oximeter will shorten the required recharging time.
Recharging Batteries (NiMH Battery Pack Only)
• When the unit is completely discharged, it takes approximately 180 minutes to recharge the
NiMH battery pack with the Model 2500C Charger Stand.
• The expected useful life of the rechargeable NiMH battery pack is 500 charge/discharge cycles,
or approximately 2 years, whichever is first. The battery pack must be charged at least once
each year to maintain optimal battery life.
• AA alkaline batteries cannot be recharged in the charging stand.
