Technical data

174 Chapter 6
Working with Batteries
Battery Care
Working with Batteries
WARNING Do not discharge the battery using any device except the specified device. When
the battery is used in devices other than the specified device, 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.
Maximizing Battery Life
The Lithium Ion battery used in the E7495A/B has a life span of approximately 300
charge cycles at room temperature, with normal charge and discharge rates. You can
maximize the number of charge cycles with reasonable battery care:
• Clean the battery contacts occasionally, using a pencil eraser or alcohol and a
cotton swab. Make sure no residue from the eraser or cotton swab is left on the
contact points.
• Cycle each battery through a full charge and full discharge on a regular basis,
preferably monthly. Even if you use external power most of the time, you will
lengthen battery life by occasionally cycling through a full discharge/recharge
cycle.
• Do not leave a battery unused for an extended period. Batteries that remain idle
eventually lose their ability to hold a charge.
• Unplug the external battery charger (Option #820) when you’re not using the
test set.
• Store batteries in a cool, dry location, away from metal objects and corrosive
gases. Extended exposure to high humidity or temperatures above 45 degrees
Celsius (113 degrees Fahrenheit) can impair battery performance and shorten
battery life. Storage limits are –20 °C to 60 °C 80% RH.
• Allow a battery to warm to room temperature before charging it. Temperature
shock can damage the battery chemistry and in some cases cause a short circuit.
• Always charge batteries at temperatures between 0 and 45 degrees Celsius (32 to
113 degrees Fahrenheit).
• Operate the test set on battery power between the temperatures of -10 and +50
degrees Celsius (–14 to +122 degrees Fahrenheit). Using the batteries at lower
or higher temperatures can damage the batteries and reduce operating life. Cold
temperatures affect battery chemistry, reducing charge capacity, especially
below 0 degrees Celsius (32 degrees Fahrenheit).
• Batteries are shipped with a minimum of 20% charge capacity to provide at least