SEL312538

Smart Lithium-ion Battery Module
250 mAh
T3.7 x W26.0 x L40.0 mm (After 500 cycles)
Specification
Value
Unit
Norminal Voltage
3.7
V
Shipping Voltage
3.70 ∼ 3.95
V
Norminal Capacity
250
mAh
0.2C Discharging
Minimum Capacity
240
mAh
0.2C Discharging
Maximum Charging Voltage
4.2
V
Standard Charging Current
0.5
C
=120mA
Maximum Charging Current
1
C
=240mA
Discharging Cut Off Voltage
3
V
Maximum Discharging Current
1
C
Internal Resistance
250
mOhm
Cycle Life
500
Cycles
0 to 45
̊C
-20 to 60
̊C
Conditions
0.2C
=240mA
over 80% at 0.5C Discharging
Operation Temperature Range
Standard Charging
Standard Discharging
Dimensions（Actual size）
L:40.0mm
W:26.0mm
REAR
SEL312538 is a Li-ion battery which achieved
3.7mm thinness and 250mAh high capacity. It is
suitable for the main power supply of thin
Bluetooth devices and handy type devices.
There is a protection circuit embedded in a small
shape of the package.
You can choose the NTC circuit and the
connector available as option.
TOP
T:3.7mm
SIDE
Specification
Charge: CC/CV 4.2V, 0.05C-cut off, 25˚C
Discharge: CC 0.2C, 3.0V cut off, 25˚C
Charge Characteristics
4.4
4.4
0.2C
0.5C
1.0C
4.2
4.0
Voltage /V
3.6
3.4
3.2
3.2
0
100.0
Temperature Characteristics
Capacity /mAh
200.0
3.0
300.0
Charge: CC/CV 4.2V, 0.5C, 0.05C-cut off, 25˚C
Discharge: CC:0.2C 3.0V-cut off
4.4
25˚C
-20˚C
-10˚C
0˚C
60˚C
4.2
4.0
Voltage /V
3.8
3.4
3.8
3.6
300.0
300.0
Charge: CC/CV 4.2V, 0.5C, 0.05C-cut off, 25˚C
Discharge: CC:0.2C 3.0V-cut off, 25˚C
1cyc
10cyc
100cyc
300cyc
500cyc
4.0
3.6
3.4
200.0
200.0
3.8
3.2
Capacity /mAh
Capacity /mAh
4.4
3.2
100.0
100.0
4.2
3.4
0
0
Cycle Characteristics
Voltage /V
Voltage /V
3.6
3.0
0.2C
0.5C
1.0C
4.2
4.0
3.8
3.0
Charge: CC/CV 4.2V, 0.5C, 0.05C-cut off, 25˚C
Discharge: 3.0V-cut off, 25˚C
Discharge Characteristics
3.0
0
100.0
Capacity /mAh
200.0
300.0
Specifications are subject to change without notice.
Seiko Instruments Inc.
Homepage http://www.sii.co.jp/small_lib/en
Smart Enerty Busines Division
8, Nakase 1-chome, Mihama-ku, Chiba-shi, Chiba 261-8507, Japan
Telephone:+81-43-211-1217 Facsimile:+81-43-211-8395
Seiko Instruments U.S.A.,Inc.
Seiko Instruments GmbH
Seiko Instruments Taiwan Inc.
Seiko Instruments (Shanghai) Inc.
Telephone:+1-310-517-7771
Telephone:+886-2-2563-5001
Telephone:+49-6102-2970
Telephone:+86-21-6375-6611
2-1502