Sealed Lead-Acid Handbook, January 1999
INDIVIDUAL DATA SHEETS
LC-X1228AP/ LC-X1228P
(a) The photo and dimensions represent LC-X1228AP
Specifications
Nominal voltage
12V
Rated capacity
(20 hour rate)
28Ah
Length
165 mm
Width
125 mm
Height
175 mm
Dimensions
Total Height
LC-X1228AP: 175 mm
LC-X1228P: 179.5 mm
Approx. mass
11.0 kg
Country of origin
Republic of China
Characteristics
20 hour rate (1.4A)
10 hour rate (2.65A)
5 hour rate (5.0A)
1 hour rate (21.0A)
28.0Ah
26.5Ah
25.0Ah
21.0Ah
Capacity
(note)
(25
C)
1.5 hour rate discharge
Cut-off voltage 10.5 V
9.8A
Internal resistance
Fully charged battery
(25
C)
Approx. 6m
Temperature
dependency
of capacity
(20 hour rate)
40
C
25
C
0
C
-15
C
102 %
100 %
85 %
65 %
Self discharge
(25
C)
Residual capacity
after standing 3 months
Residual capacity
after standing 6 months
Residual capacity
after standing 12 months
91%
82%
64%
Charge
Method
(Constant
Voltage)
Trickle use
Control
voltage
13.6 to 13.8 V
(per 12V cell 25
C)
(Note) The above characteristics data are average values obtained within three
charge/discharge Cycles not the minimum values.
Dimensions (mm)
Discharge characteristics (25
C)
(note)
Duration of discharge vs. Discharge current
(note)
Labels will vary, see page 68 for example of labels.
Terminal Type: LC-X1228AP: M5 threaded post
LC-X1228P: M5 bolt and nut
163.4
9.8
124
175 2
+
-
8.3
2.2
12
125 2
12
165 2
134
90
45.5
+
-
+
-
Battery case resin: Standard (UL94HB)
13.0
12.0
11.0
10.0
9.0
8.0
0 1 2 4 6 8 10 20 40 60 2 4 6 8 10 20 40
(Minute)
(Hour)
Duration of discharge
T
e
r
minal v
oltage (V)
56A
28A
7A
1.4A
14A
2.8A
1 5 10 50 100 500
Discharge current (A)
30
20
15
10
5
4
3
2
1.5
1
50
40
30
20
10
5
3
(Min
ute)
(Hour)
Dur
ation of discharge
40C
25C
0C
-15C
For standby power supplies.
Expected trickle life: 6 years at 25C, 10 years at 20C.
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