534                                                                                                                     Keysight N9927-90001 User’s Guide
Safety Considerations
Battery Protective Functions
Battery Protective Functions
The following protective functions are designed into the lithium-ion 
rechargeable battery system used in FieldFox. 
Do not carry or store the battery with necklaces, hairpins, or other 
metal objects.
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 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.
For a Korean battery safety consideration translation, refer to 
Appendix D:, “Korean Battery Safety Translation.”