Samsung ICR18650-26F Genuine Flat

The Samsung ICR18650-26F cell is popular top 18650 battery cells for wide applications,  specially good for those request high drain applications, with 2.6A charge and discharge current it still hold 2000mAh capacity after 1000cycles in our cycle life testing, for 500 cycles 2.6A charge and discharge it still stand 2200mAh, very impressive capacity durability why price still relatively low, its real performace is much better then manufacturer's promised datasheet in our testing. We bought this cell via big manufacturer who is Samsung's client, 100% genuine guaranteed. 

Nominal Specifications 
Item Specification 
3.1 Nominal Capacity 2600mAh (0.2C, 2.75V discharge) 
3.2 Minimum Capacity 2550mAh(0.2C, 2.75V discharge) 
3.3 Charging Voltage 4.2 ±0.05 V 
3.4 Nominal Voltage 
3.7V 
3.5 Charging Method CC-CV 
(constant voltage with limited current) 
3.6 Charging Current Standard charge: 1300mA 
 Rapid charge : 2600mA 
3.7 Charging Time Standard charge : 3hours 
 Rapid charge : 2.5hours 
3.8 Max. Charge Current 2600mA(ambient temperature 25℃) 
3.9 Max. Discharge Current 5200mA(ambient temperature 25℃) 
3.10 Discharge Cut-off Voltage 2.75V 
3.11 Cell Weight 47.0g max 
3.12 Cell Dimension Height : 65.00mm max 
Diameter : 18.40mm max 
3.13 Operating Temperature Charge : 0 to 45℃ 
 Discharge: -20 to 60℃ 
3.14 Storage Temperature 1 year : -20~25℃(1*) 
3 months : -20~45℃(1*) 
1 month : -20~60℃(1*) 
Note (1): If the cell is kept as ex-factory status (50% of charge), 
the capacity recovery rate is more than 80%. 

9. Safety 
 9.1 Overcharge Test 
 Test method: To charge the standard charged cell with 12V and 2.6A at 25℃ 
 for 2.5 hours. 
 Criteria: No fire, and no explosion. 
 9.2 External Short-circuit Test 
 Test method: To short-circuit the standard charged cell by connecting positive and 
 negative terminal by less than 50mΩ wire for 3hours. 
 Criteria: No fire, and no explosion. 
 9.3 Reverse Charge Test 
Test method: To charge the standard charged cell with charge current 2.6A 
By –12V for 2.5 hours. 
 Criteria: No fire, and no explosion. 
9.4 Heating Test 
 Test method: To heat up the standard charged cell at heating rate 5℃ per minute up to 
 130℃ and keep the cell in oven for 60 minutes. 
 Criteria: No fire, and no explosion. 

Test begainning, 2531mAh at 1.6A charge/discharge, 30mA cut off

test end, after 600cycles capacity 2191mAh.