User`s guide

2 General Power Meter Functions
100 N1913/1914A EPM Series Power Meters User’s Guide
Battery General Information
Please use this information to maintain your power meter battery in
optimum condition and prolong its operating life.
Battery Storage
If left unused, a fully charged battery discharges over a period of time. A
fully charged battery removed from a power meter and stored for a
maximum of two months retains a low- level charge. When a battery in
this low- charge state is fitted to a power meter, several hours charging
may be required before the power meter indicates the battery is charging.
Storage temperature limits: –20
°C to 60 °C, ≤ 80% RH
Failing Battery
The battery can be charged and discharged numerous times but due to
battery chemistry characteristics, the operation time decreases. When the
battery powered operation time of your power meter becomes noticeably
shorter, it is time to order a new battery.
To obtain a replacement battery, order Agilent part number N1913- 37900.
CAUTION
In extreme cases of discharge, when the battery has been stored in excess of two
months, recovery may not be possible and a replacement battery is required. A battery
that remains discharged after two days on charge can be assumed discharged beyond
recovery - a replacement is required.