Psion Teklogix 7535 G2 Manual de usuario descargar pdf (Pagina 210)

Chapter 6: Peripheral Devices & Accessories

Batteries

180 Psion Teklogix 7535 G2 Hand-Held Computer User Manual

6.3 Batteries

7535 G2s operate with lithium-ion batteries—a high capacity 1900 mAh battery pack. For

detailed safety instructions, please see “Lithium-ion Battery Safety Precautions” on

page xxiv. For details on battery charging and installation, see “Powering Up The 7535 G2”

on page 14. For battery calibration and power settings, see “Power Management Properties”

on page 118.

6.4 Battery Charging

It can take from 1.5 to 4 hours to charge a battery. The 7535 G2’s intelligent charging system

protects the battery from over-charging by terminating the charge process when the battery

is at maximum capacity. See “Approvals And Safety Summary” on page xix, for important

safety and operating instructions for battery chargers and AC/DC adaptors.

6.4.1 Battery Gas Gauge Calibration

The gas gauge indicator on the hand-held system tray and in the Power Properties dialog has

a typical accuracy of +/- 5% of nominal capacity. In order to keep this accuracy the gas

gauge (which is stored in the battery pack) needs to be calibrated occasionally. Whenever

the battery is fully discharged and then fully charged, the gas gauge becomes recalibrated.

For most users the issue of gas gauge recalibration should be invisible.

If the battery is only partially discharged or partially charged, at least 40 times, the gas gauge

will start to drift out of calibration. When this happens the gas gauge accuracy could decline

to +/- 15% of nominal. A calibration cycle (full discharge / full charge) is needed to fully

recalibrate the gas gauge. Even if the battery is never recalibrated, the gas gauge accuracy

will not drop below +/- 20% of nominal.

Note: Battery specifications are detailed beginning on page 221.

Note: Initially, new batteries that have been fully charged may indicate slightly less than

100% charge. No special conditioning is required. The full capacity of the battery

will reach 100% after 5 charge cycles through the charger.

Important: To preserve battery integrity, the charger will proceed with a charge only

when the battery temperature falls between 5° C and 39° C (41° F to 102°

F). If the battery is too hot or cold, the battery status LED flashes yellow

and the charge is suspended.

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Psion Teklogix 7535 G2 Manual de usuario Pagina 210