Juniper Systems JS600 - Manual (Page 13)

Hardware Features Page 2-7
Batteries
The FieldBook has two types of batteries:
- Ni-Cad Battery pack (main power supply)
- Lithium backup battery
▲ ▲ ▲ ▲ ▲ Battery Pack
The main power is provided by a rechargeable battery pack consisting of six AA nickel-
cadmium (Ni-Cad) batteries.
Battery Life
Battery life during manual data entry can be anywhere from 20 to 40 hours. For other
applications, battery life depends largely on what sensors are used and how much data
processing you are doing. Here are some examples of the current draw during typical tasks:
Activity Power Consumption
Powered down 0.25 mA
Waiting for input 12 mA
Processing data 25 mA
Fully charged Ni-Cad batteries have a life of 600 milliamp-hours. The formula for
calculating the expected battery life in hours follows:
H = 600/(.25A + 12B + 25C)
Where A = Fraction of time off
B =
Fraction of time on and idle
C = Fraction of time processing
The shelf life of the battery pack is about three months (left in the FieldBook).
Battery Test Connector
The PW-645 Battery Test Connector is an optional accessory that allows you to check the
battery pack voltage for your FieldBook. If you have a Battery Test Connector, refer to the
Appendix, FieldBook Battery Test Connector, for instructions on how to use it. If you are
interested in ordering one, contact Juniper Systems.