SDS

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4.1.3 Measuring Instruments and Devices
(1) Dimension measurement is carried out using a caliper whose measuring range is from 0 mm to 300mm and the
precision is 1/20 mm.
(2) Voltage measurement is carried out using a DC voltmeter, which can measure from 0 V to 20 V.
(3) The precision of the voltmeter is ±1mV and input impedance is more than 10MΩ.
(4) Discharge is carried out using electronic load equipment.
The precision of the current is ±0.5%.
(5) Impedance is carried out using an AC mΩ meter with 4 terminals at 1kHz.
4.1.4 Standard Charge
Standard charge means 2.5A CC charge to 4.4V, then CV charge till charge current deadline to 0.01C, in
25°C.
4.1.5 Standard Discharge
Standard discharge means discharging at 2.5A down to 3.0V, in 25°C.
4.1.6 Cycle life Charge / Discharge condition
Charge pack with 2.5A CC charge to 4.4V, then CV charge till charge current deadline to 0.01C, rest for 10min,
and discharge pack with 2.5A dischargeing current until pack voltage reaches
3.0V, rest for 10 minutes between each charge/discharge step, in 25°C.
4.2 Electric Characteristics
4.2.1 Initial Capacity
After standard charge, within 1 hour, the duration time of standard discharge is measured and the capacity
more than 4800 mAh.
4.2.2 Cycle Life
Packs shall be charged and discharged per 4.1.6, 299cycles at 25°C±3°C. 300st discharge capacity shall be measured
capacityʁ3840 mAh.
4.3 Safety Performance
4.3.1 Terminal short circuit
After fully charged connect positive and negative terminal with a copper wire of resistance less than 100m
Ohm.
No explode, No fire
4.3.2 Overcharge
After Fully charged, continuously charge by constant current 2.5A and constant voltage of 6V for 24hours
No explode, No fire
4.3.3 Reverse charge test
Apply 6V/2.5A current with reverse polarity for 2.5 hour at fully charged state. No explode,
No fire
4.3.4 ESD Test
Contact discharge ± 8KV , Air discharge ± 12KV
No protect function