-SAMSUNG SDI Confidential Proprietary –
Spec. No. INR18650-20Q Version No. 1.0
4.0 Outline dimensions
See the attachment (Fig. 1)
There shall be no such defects as scratch, rust, discoloration, leakage which
may adversely affect commercial value of the cell.
6.0. Standard test conditions
6.1 Environmental conditions
Unless otherwise specified, all tests stated in this specification are conducted at
temperature 25±5℃ and humidity 65±20%.
6.2 Measuring equipment
(1) Amp-meter and volt-meter
The amp-meter and volt-meter should have an accuracy of the grade 0.5mA and
mV or higher.
(2) Slide caliper
The slide caliper should have 0.01 mm scale.
(3) Impedance meter
The impedance meter with AC 1kHz should be used.
7.1 Standard charge
This "Standard charge" means charging the cell CCCV with charge current 0.5CmA
(1,000mA), constant voltage 4.2V and 20mA cut-off in CV mode at 25℃ for capacity. .
7.2 Rapid charge
Rapid charge means charging the cell CCCV with charge current 4A and 100mA cut-off
7.3 Nominal discharge capacity
The standard discharge capacity is the initial discharge capacity of the cell, which is
measured with discharge current of 400mA with 2.0V cut-off at 25℃ within 1hour
after the standard charge.
Nominal discharge capacity ≥ 2,000mAh
7.4 Standard rated discharge capacity
The standard rated discharge is the discharge capacity of the cell, which is measured
with discharge current of 10A with 2.0V cut-off at 25℃ within 1hour after the standard
Standard rated discharge capacity ≥ 1,950mAh
7.5 Initial internal impedance
Initial internal impedance measured at AC 1kHz after standard charge
Initial internal impedance ≤ 18mΩ
7.6 Temperature dependence of discharge capacity
Capacity comparison at each temperature, measured with discharge
constant current 10A and 2.0V cut-off after the standard charge is
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