3.7V 2600mAh 18650 Li-ion cell for lighting application
Specification of 3.7V 2600mAh
0.2C,( current value of 2600mA at 1C）
Alternating Internal Resistance
constant-current charge to 4.2V at 0.3C,constant voltage charge to stop until 0.01C mA
Max. Charging Current
Discharge Cut-off Voltage
Standard Discharge Current
Fast Discharge Current
Max. Continuous Discharge Current
Pulse Discharge Current
the residual capacity is no less than 70% of rated capacity at 0.5C rate.
-20°C ~ 45°C
Short-term storage (< 3 months)
Lithium battery storage
The lithium primary battery has a very low self-discharge and can be stored for 3 years. It can be stored under refrigerated conditions and the effect will be better. It is a good idea to store the lithium primary battery in a low temperature place.
Lithium-ion batteries can be stored for more than half a year at 20 ° C due to their low self-discharge rate and most of the capacity can be recovered.
The self-discharge phenomenon of lithium batteries, if the battery voltage is stored for less than 3.6V for a long time, it will cause the battery to over-discharge and damage the internal structure of the battery, reducing battery life. Therefore, the lithium battery stored for a long time should be recharged every 3 to 6 months, that is, the charging voltage is 3.8~3.9V (the optimal storage voltage of the lithium battery is about 3.85V), which is not suitable for filling.
Lithium batteries have a wide temperature range and can be used outdoors in the winter in the north, but the capacity will be much lower. If you return to room temperature, the capacity can be restored.
Lithium primary battery:
Unlike a lithium-ion battery, it cannot be charged and charging is dangerous. Other precautions, equivalent to lithium-ion batteries.
1) High voltage
The operating voltage of the single cell is as high as 3.7-3.8V (3.2V for lithium iron phosphate), which is three times that of Ni-Cd and Ni-MH batteries.
2) Long cycle life
Generally, it can reach more than 500 times, or even more than 1000 times, and lithium iron phosphate can reach more than 2000 times. For small current discharge appliances, the life of the battery will double the competitiveness of the appliance.
3) Good safety performance
No pollution, no memory effect.
4) Small self-discharge
The self-discharge rate of fully charged Li-ion storage at room temperature for 1 month is about 2%, which is much lower than 25-30% of Ni-Cd and 30-35% of Ni-MH.
5) Fast charging
The 1C charging capacity can reach more than 80% of the nominal capacity in 30 minutes, and the ferrophosphorus battery can be charged to 90% of the nominal capacity in 10 minutes.
6) Working temperature
The operating temperature is -25 to 45 ° C. With the improvement of the electrolyte and the positive electrode, it is expected to be widened to -40 to 70 ° C.