[Elecraft] Lithium Batteries

[Thomas Beaudry]

Here's the data on the SureFire cells that have been discussed:


LITHIUM BATTERY
SF123A
SPECIFICATION

Draft only - Not Released

SUREFIRE LLC


1.	Designation					:  SF123A
2.	Nominal Voltage				:  3 V
3.	Nominal Capacity				:  1400 mAh
					Load		:  100 =A5=D8 at =
20=A1=C6C
					Cut Off V		:  2.0 V

4.	Max. Continuous Discharge Current		:  1000 mA at =
20=A1=C6C

5.	Construction
5.1	Appearance, Dimensions		:  There shall be no noticeable=20=

deformation.  The dimensions shall be according to the attached=20
drawings.
5.2	Weight					:  Approx. 17 g.

6. Performance
6.1	Open Circuit Voltage		:  Min. 3 V
6.2 Duration 1. (at 20=A1=BE 2=A1=C6C)
6.2.1	Pulse Discharge Conditions	:  Average 1700 cycles
		Pulse Current		:  900 mA
		One Cycle		:  3 seconds on, 27 seconds off
		Cut Off V.		:  1.55 V
6.3 Duration 2. (at -20=A1=BE 2=A1=C6C)
6.3.1	Pulse Discharge Conditions	:  Average 1200 cycles
		Pulse Current		:  900 mA
		One Cycle		:  3 seconds on, 27 seconds off
		Cut Off V.		:  1.2 V
6.4	Impedance				:  Max 1.0 =A5=D8
6.5	Vibration Resistance			:  Deterioration of =
performance shall not=20
occur.
6.6	Temperature Range			:  Discharge	-20 to =
60=A1=C6C
						    Storage	-20 to =
45=A1=C6C
6.7	Leakage Resistance			:  The battery shall not =
show leakage or=20
salting which harms performance.

7. Test Conditions, Measuring Instruments and Measuring Methods
7.1	Test Conditions				:  If not otherwise =
specified,
								=
Temperature	;  25 =A1=BE 5=A1=C6C
								Humidity	=
;  65 =A1=BE 10%
7.2 Measuring Instruments
i)	Volt Meter				:  Internal Impedance	=
;  More than 10M=A5=D8 Accuracy		; =20
Less than 0.5%
ii)	Battery Impedance Meter		:  Sine wave A.C. method  ;  1 =
kHz 0.1mA=20
(National Digital milliohm Meter [VP-2811A] )
iii)	Caliper				:  Accuracy		;  Less =
than 1% by JIS
iv)	Balance				:  Sensitivity		;  More =
than 100 mg

7.3 Measuring Method
i)	Outer Dimensions			:  This shall be =
measured with the caliper=20
described in Item 7.2 iii ).
ii)	Weight				:  This shall be measured with =
the balance described in=20
Item 7.2 iv ).
iii)	Appearance				:  Deformation or =
tarnish shall be visually checked.
iv)	Open Circuit Voltage		:  This shall be measured with =
the volt meter=20
described in Item 7.2 i ).
v)	Operating Time (Duration)		:  Operating time shall =
be measured with=20
cycles until terminal voltage reaches the specified cut-off voltage.
vi)	Battery Impedance			:  This shall be =
measured by the meter=20
described in Item 7.2 ii ).
vii)	Vibration Resistance		:  Amplitude  ; 2 mm
			Number of Vibrations  ;  1000rpm.
			Directions  ;  X, Y, Z
			Time;  30 minutes in each direction
viii)	Leakage Resistance		:  Heat cycle test
						:  Leakage, appearance =
and outer dimension shall be checked after=20
10 cycles according to MIL-STD-202E-106D.  The battery shall be kept in=20=

a dry place.  It should not show any dew point when stored in this=20
condition.

8. Precautions for use
1) A battery shall not be stored at temperatures in excess of 45=A1=C6C. =
=20
Storage at less than 30=A1=C6C is recommended.  Storage at less than =
-20=A1=C6C=20
can deform the plastic parts and may cause leakage.  To prevent=20
self-discharge caused by corrosion, or decrease of insulation, humidity=20=

during storage shall be less than 70%.
2) The battery has an explosion resistant construction.  But the=20
following cautions should be taken, because combustible materials such=20=

as lithium metal and organic electrolyte are contained in the battery.

* Do not short circuit.
* Do not dispose in fire.
* Do not charge.
* Do not disassemble.
* Do not mix fresh batteries with used batteries or other battery types.

3) Keep away from heat source or flame.
4) The battery shall not be washed by ultrasonic wave washer.=