Samsung ICR18650-28A li ion battery cell

The Samsung ICR18650-28A cell is 4.3V rating 18650 battery cells for those request high drain applications with 6A discharge current. At 4.25V you can get 2750mAh while with 4.3V it is 2850mAh. In our cycle life testing, 2A charge 2A discharge capacity falls from 2350mah (because we apply 0.5A cut off charging model, which doesnot release the capacity in full) to 2100mah after 510cycles, say 0.45mAh per cycle drop only. This is very good cell if you use it at 4.2v only and donot care about the capacity potential unused. 

Nominal Specifications 

3.1 Nominal Capacity 2800mAh (0.2C, 2.75V discharge) 
3.2 Minimum Capacity 2700mAh(0.2C, 2.75V discharge) 
3.3 Charging Voltage 4.3 ±0.03 V 
3.4 Nominal Voltage 3.75V 
3.5 Charging Method CC-CV 
(constant voltage with limited current) 
3.6 Standard Charging 
Current Standard charge: 1400mA (Reconmendation) 
3.7 Standard Charging Time Standard charge : 3hours 
3.8 Max. Charge Current 2800mA(ambient temperature 25℃) 
3.9 Max. Discharge Current 5600mA(ambient temperature 25℃) 
3.10 Discharge Cut-off Voltage 2.75V 
3.11 Cell Weight 48.0g max 
3.12 Cell Dimension Height : 65.00mm max 
Diameter : 18.40mm max 
3.13 Operating Temperature 
 (Ambient) 
Charge : 0 to 45℃ 
Discharge: -20 to 50℃ 
※Cell surface temperature when discharging: Max 75℃ 
3.14 Storage Temperature 
1 year : -20~25℃(1*) 
3 months : -20~45℃(1*) 
1 month : -20~50℃(1*) 
Note (1): If the cell is kept as ex-factory status (50% of charge), 
 the capacity recovery rate is more than 80%. 

lygte-info Capacity Testing

2A charging-Discharging Cycle Life Testing (500mAh cut off)

Test begainning, 2356mAh at 4.2V 2A charge 500mA cut off, 2A discharge 2.75v cut off.

test end, after 500cycles capacity 2110mAh, perfect cell!