Constant Power Discharge (Watts Per Cell) at 250C (770F)

5h 8h 20hF.V.(V/cell)

DischargeTime

1.60V

1.65V

1.70V

1.75V

1.80V

1.85V

5min 10min 15min 30min 1h 2h 3h 10h

1.87

1.86

1.84

1.83

1.82

1.81

3.51

3.48

3.45

3.41

3.38

3.31

4.28

4.24

4.20

4.15

4.10

3.99

6.38

6.30

6.20

6.07

5.97

5.77

9.57

9.39

9.24

9.02

8.74

8.33

13.1

12.8

12.5

12.2

11.8

11.1

22.9

22.2

21.5

20.9

20.0

18.5

39.4

38.1

36.6

35.1

33.5

30.5

63.9

60.7

57.5

54.3

50.9

43.8

77.0

72.8

68.9

63.7

58.5

49.8

110.4

104.7

97.20

88.40

78.70

65.00

Constant Current Discharge (Amperes Per Battery) at 250C (770F)

5h 8h 20hF.V.(V/cell)

DischargeTime

1.60V

1.65V

1.70V

1.75V

1.80V

1.85V

5min 10min 15min 30min 1h 2h 3h 10h

60.9

57.2

52.7

47.5

41.9

34.3

41.7

39.2

36.8

33.8

30.8

26.0

34.1

32.2

30.3

28.4

26.5

22.7

20.5

19.8

18.9

18.1

17.2

15.6

11.7

11.3

10.9

10.6

10.1

9.36

6.69

6.51

6.34

6.18

5.97

5.56

4.86

4.75

4.67

4.55

4.39

4.17

3.22

3.17

3.11

3.04

2.98

2.87

2.15

2.12

2.10

2.07

2.03

1.98

1.76

1.74

1.72

1.70

1.67

1.63

0.94

0.93

0.92

0.91

0.90

0.89

Applications

Uninterruptible Power Supply (UPS)Electric wheelchairs, scooters, bikesElectronic apparatus and equipmentAlarm and security systemsEmergency first responder equipmentEmergency lightingMedical devicesElectric cartsTelecom equipmentSwitchgearSolar power systems

MH47929

Specifications

Nominal VoltageNominal Capacity (20HR)Dimension

Approximate WeightBattery TypeTerminal TypeRated Capacity

Max. Discharge CurrentInternal ResistanceOperating Temp. Range

Nominal Operating Temp. RangeContainer MaterialCapacity affected by Temperature

Self Discharge

12V18AHLengthWidthHeightTotal Height (with Terminal)5.4 kg (11.90 lbs)Valve Regulated Lead-Acid Battery, AGM DesignNB18.2AH17.0AH15.2AH14.6AH11.7AH180A15mΩDischarge: Charge: Storage: 25±30C (77±50F)ABS (Option: 94-HB & 94-V0 flame retardant case)400C (1040F)250C (770F)00C (320F)SigmasTek SP series batteries may be stored for up to6 months at 250C (770F) and then a freshening charge is recommended. For higher temperatures the time interval will be shorter.

181mm (7.13 inches)76mm (3.00 inches)

167mm (6.59 inches)167mm (6.59 inches)

(20hr,1.75V/cell,250C/770F)(10hr,1.75V/cell,250C/770F)(5hr,1.75V/cell,250C/770F)(3hr,1.60V/cell,250C/770F)(1hr,1.60V/cell,250C/770F)

-200C (-40F)~500C (1220F) -200C (-40F)~500C (1220F) -200C (-40F)~400C (1040F)

103% 100% 86%

SP12-18(12V18AH/NB)

Contact InformationT: (888) 988-8290

www.sigmastek.comorder@sigmastek.com

SigmasTek7651 W 100th PlaceBridgeview, IL 60455, USA

Temperature Effects on Long Term Float Life

0.5

1

2

3

4

56

8

10

20 30 40 5068 86 104 122

OCOF

Battery temperature

Life

exp

ecta

ncy

(yea

r)

Charging voltage:2.25V/cell

Temperature Effects in Relation to Battery Capacity

0

20

40

60

80

100

120

-20 -10 0 10 20 30 40 50

Temperature (0C)

Cap

acity

(%)

0.05CA0.1CA0.2CA

1.0CA

2.0CA

3.0CA

Float Charging Characteristics

6.0

6.5

7.0

7.5

5.5

(XCA)

0.10

0.15

0.20

0.25

0.05

0

%

30

50

40

60

70

80

90

100

120

110

(V) (V)

12.0

13.0

14.0

15.0

11.0

2.00

2.17

2.33

2.50

1.83

(V) 0.10CA-2.25V/cell temperature 250C

0

10

20

ChargeVolume

ChargingCurrent

ChargingVoltage

ChargingVoltage

0 4 8 12 16 20 24 28 32 36 40

Charging Time (hours)

After 100% Discharge

Charge Voltage(Constant 2.25v/cell)

Charging Current

After 50% Discharge

Charged Volume

Discharge Characteristics

Temperature: 250C (770F)4.33

4.00

3.66

3.33

3.00

2.678.0

9.0

10.0

11.0

12.0

13.0 6.5

6.0

5.5

5.0

4.5

4.0

2.16

2.00

1.84

1.68

1.52

1.36

2VBatteryЈVЈ

4VBatteryЈVЈ

6VBatteryЈVЈ

12VBatteryЈVЈ

1 2 4 6 8 10 20 40 60 2 4 6 8 10 20

Min H

Discharge Time

Term

inal

Vol

tage

(V) 0.05C0.093C

0.207C0.4C

0.628C1C

2C3C

Self Discharge Characteristics

0

20

40

60

80

100

2 4 6 8 10 12

Storage Time (Months)

Rem

aini

ng C

apac

ity (%

)

40oC 30oC

25oC

10oC

Cycle Service Life

0

20

40

60

80

100

120

200 400 600 800 1000 1200

Ambient Temperature:25oC (77oF)

DischargeDepth 30%

DischargeDepth 50%

DischargeDepth 100%

Number of Cycles (Times)

Cap

acity

(%)

DimensionsNB TerminalUnit: mm (inches)

167

±1 (6

.59

±0.0

4)

SP12-18 (12V18AH/NB)Rechargeable Sealed Lead-Acid Battery

CHARGING INSTRUCTION

Floating use: 13.50 ~ 13.80VCycle use: 14.40 ~ 15.0VInitial current: max 5.40A www.sigmastek.com

MH47929

181 ± 1 (7.14 ±0.04)

76 ±

1 (3

.00

±0.0

4)

14 (0.551)

4.5

(0.1

77)

13 (0

.512

)

6 (0

.236

)

2 (0.079)