286                                                                                                                     Keysight N9938-90003 User’s Guide
Safety Considerations
For the Battery
For the Battery
Lithium battery packs may get hot, explode, or ignite and cause serious injury if 
exposed to abuse conditions. 
This section contains the following:
— “High Capacity Lithium Battery (N9910X-876)”
— “Standard Capacity Battery (N9910X-870)”
High Capacity Lithium Battery (N9910X-876)
Lithium battery (High Capacity): N9910X-876 (battery Keysight part number: 
1420-0937) is used to provide power to a family of portable microwave test 
instruments produced by Keysight Technologies. Be sure to follow these safety 
warnings: 
External battery, U.S. 
FCC compliance
Battery storage:
 The only instructions related to storage have to do with temperature and are listed below
— "Temperature (1 month): -20°C to +45°C
— "Temperature (6 month): -20°C to +40°C
— "Temperature (12 month): -20°C to +35°C
Rating:  10.8V 6400mAh 70Wh
Lithium–ion batteries:
— Must not be exposed to high temperatures (>70°C) or fire.
— Must be kept away from children.
— Must not be short circuited.
— Must be replaced only with Keysight qualified Li–ion batteries.
— If replaced or charged improperly, there is a danger of explosion.
Do not connect the positive terminal and negative terminal of the 
battery to each other with any metal object (such as wire).
Do not carry or store the battery with necklaces, hairpins, or other 
metal objects.