Psion Teklogix 7525 user manual High-Capacity Battery Pack

Chapter 10: Specifications

High-Capacity Battery Pack

Storage Temperature	-20° C to 60° C (-4° F to 140° F) Storing battery at elevated
	temperatures is not recommended.
	300 cycles minimum with no degradation below 80% of
Cycle Life	nominal capacity based on standard charge / standard discharge
	rates (to 2.8V) @ 25ºC
Impedance	45m¾ max. @ 1kHz AC only the battery cell
Total Internal Resistance	200 m ¾max., fully charged new pack (including cell resis-
	tance and protection circuit resistance) @ 1kHz AC
High Temperature	>60% nominal capacity after 20 days @ 60° C (full charge) --
Recovery	(140° F)
Low Temperature	>80% nominal capacity after 72 hours @ -20° C (full charge) -
Recovery	- (-4° F)
	-20° C to 60° C (-4° F to 140° F) >80% capacity recovery
	within 1 month
Capacity recovery	-20° C to 45° C (-4° F to 113° F) >75% capacity recovery
	within 3 month
	-20° C to 20° C (-4° F to 68° F) >70% capacity recovery within
	1 year

10.4.2 High-Capacity Battery Pack

	Lithium Ion Polymer Battery (Li-Polymer)
	2625 mAh nominal at 350mA discharge 20 °C (68° F) to
Chemistry Capacity	2.8V(minimum)
	1800 mAh nominal at 300mA discharge at –20 °C to
	2.8V (minimum)
Voltage	3.7V nominal (2.8V min. to 4.2V max.)
Cell Configuration	1S3P (3 parallel connected cells)
Cell Type	Lithium-ion Polymer Battery
Max. Discharge	1.7A (-10° C to 60° C) -- (14° F to 140° F)
Current	0.5C (-20° C to 60° C) -- (-4° F to 140° F)
Charge Algorithm	CC to CV
Max. Charge Voltage	4.2V +/- 0.05V
Max. Charge Current	900 mA
Discharge Cut-off	2.6V min – DS2761 protection circuit initiates
Recommended	2325 mA for 4.0 hrs
Fast Charge

314Psion Teklogix WORKABOUT PRO With Windows Mobile 2003 SE User Manual