Rechargeable Lithium-ion INR18650 D2 Battery Pack Of 10

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INR18650 D2
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Product Overview

Nominal Specification
                Item        Condition/ Note        Specification
Capacity   Std. charge / discharge


Nominal Voltage   3.64V
Constant voltage   4.20V
Max. Charge Voltage   4.20V ± 0.05V
Max. Charge Current   1.0C (2950mA)
Constant current   0.2C (590mA)
End voltage(Cut off)   2.75V
Max. 49.0 g
Temperature Charge   0 ~ 45oC
Temperature Discharge   20 ~ 60 oC



Charging current:

Charging current should be less than the maximum charge current specified in the Product Specification. Charging with higher current than recommended value may cause damage to cell electrical, mechanical and safety performance and could lead to heat generation or leakage.

Charging voltage:

Charging shall be done by voltage less than that specified in the Product Specification (3.2V/cell). Charging beyond 3.70V, which is the absolute maximum voltage, must be strictly prohibited. The charger shall be designed to comply with this condition. Charging with higher voltage than maximum voltage may cause damage to the cell electrical, mechanical safety performance and could lead to heat generation or leakage.

Prohibition of reverse charging:

Reverse charging is prohibited. The cell shall be connected correctly. The polarity has to be confirmed before wiring. In case of the cell is connected improperly, the cell cannot be charged. Reverse charging may cause damage to the cell which may lead to degradation of cell performance and damage the cell, which will cause heat generation or leakage.


Discharging current:

The cell shall be discharged at less than the maximum discharge current specified in the Product Specification. High discharging current may reduce the discharging capacity significantly or cause over-heat.


It should be noted that the cell would be at an over-discharged state by its self-discharge characteristics in case the cell is not used for long time. In order to prevent over-discharging, the cell shall be charged Periodically to maintain between 3.2V and 3.4V. Over-discharging may cause loss of cell performance, characteristics, or battery functions. The charger shall be equipped with a device to prevent further discharging exceeding a cut-off voltage specified in the Product Specification. Also, the charger shall be equipped with a device to control the recharging procedures as follows: The cell battery pack shall start with a low current (0.01C) for 15 - 30 minutes, i.e., pre-charging, before rapid charging starts. The rapid charging shall be started after the (individual) cell voltage has been reached above 3V within 15 - 30 minutes that can be determined with the use of an appropriate timer for pre-charging. In case the (individual) cell voltage does not rise to 3V within the pre-charging time, then the charger shall have functions to stop further charging and display the cell/pack is at abnormal state.

Lithium Battery Advantages:


1.Long life cycle, large capacity and good shock resistance
2.Low self-discharge and good discharge performance at low temperature
3.Strong charging acceptance and quick-charging capability
4.Strong over-discharge resistance and charge retention
5.Maintenance-free and no acid or water for maintenance in usage
6.Excellent large current discharge performance, and have obvious advantages in startup and climbing
7. High temperature performance
8. Environmentally friendly
9. Lighter weight smaller size.



  • Do not exceed any of the rated specifications
  • Do not charge or discharge near flammable materials or gas
  • Do not disassemble or reconstruct
  • Do not throw, puncture, or incinerate
  • Do not ingest
  • Do not let batteries get wet or submerged
  • Do not allow the positive and negative poles to connect with conductive materials
  • Do not reverse polarity
  • Do not insert insulation or other objects between the metal plate, cell, or other components
  • Do not store or transport improperly
  • Do not mix use with other battery brands or models
  • Do not solder directly on the cell
  • Do not overheat, overload, or give excess pressure (especially to the negative terminal) to the battery during solder or weld
  • Do not touch a leaking cell.


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