Keysight N9938-90003 User’s Guide                                                            287
Safety Considerations
For the Battery
Do not pierce the battery with nails, strike the battery with a 
hammer, step on the battery, or otherwise subject it to strong 
impacts or shocks.
Do not solder directly onto the battery.
Do not expose the battery to water or salt water, or allow the 
battery to get wet.
Do not disassemble or modify the battery. The battery contains 
safety and protection devices, which if damaged, may cause the 
battery to generate heat, explode, or ignite.
Do not place the battery in direct sunlight, or use or store the 
battery inside cars in hot weather. Doing so may cause the battery 
to generate heat, explode, or ignite. Using the battery in this 
manner may also result in a loss of performance and a shortened 
life expectancy.
There is a danger of explosion if the battery is incorrectly replaced. 
Replace only with the same or equivalent type of battery 
recommended. Discard used batteries according to manufacturer’s 
instructions.
If you are charging the batteries internally, even while the FieldFox 
is powered off, the FieldFox may become warm. Allow for proper 
ventilation.
Do NOT run the FieldFox with the vents blocked or in the carrying 
case.
Do not discharge the battery using any device except the FieldFox 
or the external battery charger (N9910X–872). When the battery is 
used in a device other than those specified, it may damage the 
battery or reduce its life expectancy. If the device causes an 
abnormal current to flow, it may cause the battery to become hot, 
explode, or ignite and cause serious injury. 
The external battery charger discharges during recalibration.
For a Korean battery safety consideration translation, refer to 
Appendix D:, “Korean Battery Safety Translation.”
For a Russian battery safety consideration translation, refer to 
Appendix E:, “Russian Battery Safety Translation.”
The external battery is not rated for use in a wet location. Do not use 
the external battery in a wet location.