-SAMSUNG SDI Confidential Proprietary –
Spec. No. ICR18650-26H Version No.
1.0
the interval for temperature change is 3 hours.
Percentage as an index of the capacity at 25℃(=2550mAh) is 100%.
7.5 Temperature Dependence of Charge Capacity
Capacity comparison at each temperature, measured with discharge constant current
520mA and 2.75V cut-off after the standard charge is as follows.
Relative Capacity
Charge temperature
0℃
25℃
45℃
80%
100%
80%
Discharge temperature
25℃
Note: If charge temperature and discharge temperature is not the same,
the interval for temperature change is 3 hours.
Percentage as an index of the capacity at 25℃(=2550mAh) is 100%.
7.6 Charge Rate Capabilities
Discharge capacity is measured with constant current 520mA and 2.75V cut-off
after the cell is charged with 4.2V as follows.
Current
Cut-off
Relative
Capacity
0.2C
(520mA)
7h or 0.05C
100%
Charge Condition
0.5C
(1300mA)
1.0C
(2600mA)
2.5h or 0.05C 2.5h or 0.05C
2.0C
(5200mA)
2.5h or 0.05C
95%
90%
80%
Note: Percentage as an index of the capacity at 25℃(=2550mAh) is 100%.
7.7 Discharge Rate Capabilities
Discharge capacity is measured with the various currents in under table and 2.75V
cut-off after the standard charge.
Current
Relative
Capacity
0.2C
(520mA)
100%
Discharge Condition
0.5C
(1300mA)
1.0C
(2600mA)
95%
90%
2.0C
(5200mA)
80%
Note: Percentage as an index of the capacity at 25℃(=2550mAh) is 100%.
7.8 Cycle Life
Each cycle is an interval between the charge (charge current 1300mA) with 2.5h or
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-SAMSUNG SDI Confidential Proprietary –
Spec. No. ICR18650-26H Version No.
1.0
the product specification.
3.2.2 Otherwise, it may cause loss of characteristics.
3.3 Over-discharging
3.3.1 The system should equip with a device to prevent further discharging
exceeding discharging cut-off voltage specified in the product
specification.(over-discharging)
3.3.2 Over-discharging may cause loss of performance, characteristics, of
battery function.
3.3.3 Over-discharging may occur by self-discharge if the battery is left for
a very long time without any use.
3.3.4 The charger should equip with a device to detect cell voltage and to
determine recharging procedures.
4. Storage
4.1 Storage conditions
4.1.1 The cell should be stored within a range of temperatures specified
in the product specification.
4.1.2 Otherwise, it may cause loss of characteristics, leakage and/or rust.
4.2 Long-term storage
4.2.1 The cell should be used within a short period after charging because
long-term storage may cause loss of capacity by self-discharging.
4.2.2. If long-term storage is necessary, the cell should be stored at lower
voltage within a range specified in the product specification, because
storage at higher voltage may cause loss of characteristics.
5. Cycle life
5.1 Cycle life performance
5.1.1 The cell can be charged/discharged repeatedly up to times specified in
the produce specification with a certain level of capacity also specified
in the product specification.
5.1.2 Cycle life may be determined by conditions of charging, discharging,
operating temperature and/or storage.
6. Design of System
6.1 Connection between the cell and the battery
6.1.1 The cell should not be soldered directly with leads. Namely, the cell
should be welded with leads on its terminal and then be soldered with
wire or leads to soldered lead.
6.1.2 Otherwise, it may cause damage of component, such as separator and
insulator, by heat generation.
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