User Manual

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The Talkman® T2 terminal is powered by a battery that was designed by and specially made for
Vocollect. The battery is available in two models: standard and high capacity. The primary
difference between the two models is the length of time that the batteries will power a
terminal before they need to be recharged. The standard battery does not provide the
extended runtime that is achieved by using the high capacity battery. However, the standard
battery is more compact in size and sits flush with the top of the terminal when it is placed
into the terminal's battery compartment. The high capacity battery, while offering the greater
runtime, is larger than the standard battery and does not sit flush with the top of the terminal
when it is placed into the battery compartment.
Over time, the life cycle of a normal rechargeable battery decreases, or suffers memory
effect. However, this is not the case with either of the Talkman terminal's batteries. Due to
the lithium ion battery technology that has been incorporated into their design, the Talkman
batteries do not suffer memory effect. This means that it is not necessary to fully deplete the
battery’s current charge before recharging the battery. Also, battery reconditioning should not
be necessary.
The length of time that it takes to completely charge a fully depleted battery is approximately
3 hours for the standard battery and 5 hours and 30 minutes for the high capacity battery. This
does not include any time that may be necessary to bring a battery that is too cold, too warm,
or completely dead into a charging state (a battery that is too cold, too warm, or completely
dead needs to warm up, cool down, or partially charge before it actually enters a fast charging
state).
Procedures
• Changing a Battery
• Charging a Battery in a Battery Charger
Specifications
• Standard Battery Specifications
• High Capacity Battery Specifications
• Cleaning Battery Contacts
Standard Battery Specifications
The following information details the specifications for the two-cell custom battery pack
designed specifically for the Talkman terminal.
Electrical Specifications
• Cells: The standard battery pack uses two lithium ion cells.
• Nominal voltage = 7.2V
• Capacity = 1500mAhr or greater
• Protection circuit characteristics: The pack contains a protection circuit that prevents
over and under voltage conditions on the cells and protects the pack from damage as a
result of a short circuit between the positive and negative terminals of the battery.
• Thermistor: The battery pack contains a negative temperature coefficient thermistor.
The charger uses the voltage drop across the thermistor to determine that the battery
pack is within the proper charging temperature limits.
• Battery Charging: It is very important to note that the battery pack should only be
charged in a Vocollect designated charger.
Mechanical and Environmental Specifications
• Drop test specifications
• The standard battery meets the MIL STD 810F specification for shock and transient
drop criteria.