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JANUS? 2020 Hand-Held Computer (4MB) - Intermec

JANUS? 2020 Hand-Held Computer (4MB) - Intermec

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<strong>JANUS</strong> <strong>2020</strong> <strong>Hand</strong>-<strong>Held</strong> <strong>Computer</strong> User’s Manual (<strong>4MB</strong>)nugg nugg<br />

Learning About the Reader’s Batteries<br />

2-34<br />

There are two batteries in the <strong>JANUS</strong> <strong>2020</strong> reader:<br />

Lithium Bridge Battery This battery backs up the RAM and clock when the<br />

NiCad battery pack is removed from the reader.<br />

NiCad (Nickel-Cadmium) Battery Pack This battery provides the main power<br />

source to operate the reader.<br />

Lithium Bridge Battery<br />

Your <strong>JANUS</strong> reader contains an internal rechargeable bridge battery that is<br />

designed to maintain your data (RAM) and clock while you change the NiCad<br />

battery pack.<br />

Note: The internal bridge battery is NOT user-serviceable. You must return the<br />

<strong>JANUS</strong> device to <strong>Intermec</strong> to replace the battery.<br />

How to Maximize the Internal Bridge Battery Life<br />

Your lithium bridge battery will maintain data for 72 hours if you follow these<br />

guidelines:<br />

• If you are not using the reader for a period of time (more than 60 hours),<br />

press to turn the reader off. Keep a charged NiCad battery pack in the<br />

reader. If you leave the reader without at least a partially charged NiCad battery<br />

pack installed, the internal bridge battery will discharge and you will lose any data<br />

left in RAM. The bridge battery will recharge after you insert another<br />

partially or fully charged main battery.<br />

• Remove any PC cards in the device.<br />

• If the NiCad battery pack charge becomes low, insert another charged<br />

NiCad battery pack or attach an external power supply. Use the<br />

communications dock or the optical link adapter to attach external power.<br />

• If you are not going to use the reader for more than 1 week, it is very<br />

important that you put the reader in Storage mode. For help, see “Using<br />

Storage Mode to Preserve the Bridge Battery” in Chapter 9.<br />

• Discharge durations of greater than one month will not damage the ability<br />

of the bridge battery to be recharged , but will cause loss of Time, Date and<br />

data in RAM. More than 30 such cycles will gradually lower the 72 hour<br />

data retention period. You need to reset the Date and Time settings for such<br />

discharges or the device repeatedly reports a low backup battery.

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