Technical data

176 Chapter 6
Working with Batteries
Battery Specifications
Working with Batteries
Battery Specifications
The E7495A/B Base Station test set uses the Inspired Energy NI2040AG Smart
Battery, which produces 10.8 volts DC at approximately 6000 mA. The NI2040AG
is a Lithium Ion battery pack, which uses the System Management Bus (SMBus)
interface to communicate with the test set and charger. To charge the batteries, use
only the Agilent approved SMBus charger of Level II or higher or the E7495A/B.
External charging voltage is 18 V to 24 VDC.
The battery is designed for approximately 300 full charge/discharge cycles at room
temperature and under normal rates of discharge.
The NI2040AG uses electronically programmable read-only memory (EPROM) to
store key data regarding the battery cells and charge capacity.
Protection Electronics
The NI2040AG SMBus battery uses several protection devices to prevent damage to
the battery and test set. The battery is internally protected against excessive current
draws and reduced loads (shorts), excessive voltage and temperatures.
During charging and discharging, the battery will monitor and report its voltage,
current, and temperature. If any of these monitored conditions exceeded their safety
limits, the battery will terminate any further charge or discharge until the error
condition is corrected.
Test Set Operation: Battery Current Drain in the Off or Standby Mode
The E7495A/B provides two “powered down” modes: off and standby.
When the test set is operating from battery power, it continues to draw current in
both off and standby modes.
•
Standby Mode:
When in standby mode the test set draws 70 mA, or 28% of a full battery charge
in a 24-hour period.
•
Off Mode:
For Test Sets with a Serial Number Prefix of MY46360101 and above, when in
Off mode, the test set draws 7 mA, or 3% of a full battery charge in a 24-hour
period.