174 N9912A FieldFox User’s Guide
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 175.
Internal Charging with the AC/DC Adapter
Important: Read the safety information for the AC/DC adapter on page 189.
Internal charging time for a fully depleted battery is approximately 4 hours with
the FieldFox either ON or OFF.
AC/DC adapter
To charge a battery inside the FieldFox, insert the AC/DC adapter plug into the
Power connector on the FieldFox side panel (middle hinged door), then plug the
adapter into an AC outlet.
FieldFox ON: Charging is indicated by a battery icon in the upper right of the
front panel screen.
FieldFox OFF: Charging is indicated by the FieldFox power LED glowing
amber, with its intensity increasing from dim to bright every few seconds. This
pattern repeats until the LED turns off when charging is done. Learn more on
page 16.
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