Charging The Battery - Agilent Technologies N9913A User Manual

5. Current – amount of current being consumed when operating from internal
6. Battery Temperature – internal temperature of the battery as measured by a
7. Present Run Time to Empty – minutes of power remaining based on
8. Charge Cycles – number of charge cycles the battery has experienced.
Built-In Battery Gauge
Each lithium ion battery has an LED gauge that displays its charge status. The
gauge is active unless the battery is in shutdown mode.
To view the LED gauge, open the FieldFox battery compartment door, remove the
battery, then press the button on the battery.
The battery in your FieldFox will have either 4 or 5 LED segments.

Charging the Battery

When you receive your FieldFox, the lithium-ion battery is partially charged to
approximately 30% to 40% to preserve battery life. Allow four hours to fully
charge the battery internally, or three hours by using the external battery charger
(N9910X–872). A fully charged battery will power your FieldFox for about four
hours. It is NOT necessary for you to do any type of battery preconditioning
before use.
The FieldFox circuitry ALWAYS prevents the battery from discharging to a level
that is damaging. However, if the battery is completely discharged, the FieldFox
may not turn ON. If this occurs, the battery can still be charged either internally
or externally.
Because a lithium-ion battery has no memory effect, you can charge a battery at
any time regardless of the current charge status. However, this could impair the
accuracy of its internal charge-remaining indicator. When the Max Error is 10%
or greater, the battery should be reconditioned. Learn more on page 219.
Internal Charging with the AC/DC Adapter
Important: Read the safety information for the AC/DC adapter on page 223.
Internal charging time for a fully depleted battery is approximately 4 hours with
the FieldFox either ON or OFF.
Working with the Lithium-Ion Battery
battery. If battery is charging, indicates amount of charging current.
sensor embedded in the battery.
amount of current being used now.
Charge cycle defined as ≥80% change in relative state of charge.
5-segment Charge
Gauge Remaining
5 segments ≥80%
4 segments 60% to 79%
3 segments 40% to 59%
2 segments 20% to 39%
1 segment < 20%
4-segment Charge
Gauge Remaining
4 segments ≥75%
3 segments 50%,to 74%
2 segments 25% to 49%
1 segment < 25%
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