Battery Life Of The Netpad Variants - Psion Teklogix Psion User Manual

Windows ce .net 4.2

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9.1.6 Battery Life Of The netpad Variants

Many variables affect netpad power consumption and battery life. Unlike other

battery chemistries, Lithium Ion batteries do not suddenly fail unless they have been

abused in some way. The battery capacity gradually reduces over the lifetime of the

battery. Typically, the capacity of a netpad battery pack will decline by approxi-

mately 15-20% of initial capacity over 300 deep charge/discharge cycles. The

battery capacity also declines slowly with aging, i.e. in storage.

Note: The Power Properties menus described on pages 16 to 23 are designed to

allow users to set the optimal power management settings that will deliver

the best battery life performance for a given usage scenario. Please refer to

"Usage Scenarios" on page 172 for examples.

'End-of-life' expectancy is about 300 deep charge/discharge cycles, with 50% of

original capacity remaining at approximately 500 cycles. A deep charge/discharge

cycle is when the battery is fully charged and then fully discharged. The number of

cycles is proportional to the depth of the charge/discharge—for example, if the

battery is only half discharged and then recharged, about 600 cycles can be

expected.

Table 9.1 shows the measured battery life for the netpad product range under

various conditions. The battery life figures quoted are for guidance only. Actual

battery life experienced may vary from the figures quoted.

netpad Battery

Warehouse

(Windows CE

.NET O/S)

1100 mAh

1800 mAh

4400 mAh

Meter Reading Field Service

The 1800 mAh battery life ranges from 5 to 6 hours under most

usage conditions, dropping to 4 to 4.5 hours only when exposed

to an ambient temperature of -20° C.

Table 9.1 Battery Life (In Hours)

Psion Teklogix netpad Windows CE .NET 4.2 User Manual

Chapter 9: Troubleshooting And Tips