18650 li-ion battery pack 7.4V

Item : Li-ion battery
Voltage: 7.4v
Capacity: 1800mAh to 3000mAh
PCM: yes
Safety protection: yes
Dimensions: customize
Connector: optional

We supply battery pack voltage & capacity as customer’s requirements.

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Lithium Polymer Battery Specification

Product name: Flat Lithium-Polymer Rechargeable batteries

Product Item: 18650 7.4V 2600mAh

1.Normal Specialties

NO Item Common Idex Note
1 Nominal Capacity Typical Capacity 2600mAh Standard Charged discharge at 0.2C5A,Repeat 5 times get average .
Minimum Capacity 2600mAh
2 Typical Voltage 7.4V Work Voltage
3 Discharge Cut-off Voltage 5.6V Discharge Cut-off Voltage
4 Max. Charge Voltage 8.4V Charge Max Limited Voltage
5 IR ≤150mΩ At Semi-state,use AC measured the IR (Less than a week after using the ship and cycle times of less than five times the new battery measurement )
6 Typical Charge Continue Current:0.2C5A

Continue Voltage:4.20V

Cut-off Current:0.02C5A

Charge Time: About 5hours
7 Typical Discharge Continue Current:0.2C5A

Cut-off Voltage:3.0V

8 Way of Charge CC/CV
9 Max .Charge Current 2600mA Advice charge current:0.2C~0.5C
10 Max.Discharge Current 5200mA
11 Range of Temperature Operating Charging Temperature 0 ~ +45℃
Storage Humidity 60±25%RH
Operating Discharge Temperature -10 ~ +60℃
13 Fast Charge Continue Current:1C5A

Continue Voltage:4.20V

Cut-off Current:0.02C5A

Charge Time: About 2.5 hours
14 Fast Discharge Continue Current:1C5A

Cut-off Voltage:3.0V

15 Max.Continue Charge Current 1C5A
16 Max.Continue Discharge Current 2C5A
18 PCM safety protection Over charge protection

Over discharge protection

Over voltage protection

Under voltage protection

Over current protection

Short circuit protection

19 Storage Temperature Scope Discharge :-10 ~ +60℃

( Less than one year:-20 ~ +25℃ ;

Less than 3 months :-20 ~ +40℃)

At goods delivery situation,  Humidity scope: 60±25%RH
20 Weight Appropriate:90g ±0.5g


  1. 2.Appearance

Battery doesn’t affect the commercial value of its shortcomings,such as: mechanical damage,deformation,discoloration. No such surface:leakage,stains,rust,leakage and other defects affecting goods marke value.

  1. Performance

3.1 Standard Test Conditions

If not specified, the test shall be 25%-85% of the environment ,carried out at 20±5℃humidity ,the humidity is too much will effect on the accuracy of test results, the test must be used for no more than a new battery after shipment from our factory,and the cells not be cycled more than 5 times before the test .

3.2 Measuring Instrument or Apparatus

3.2.1 Dimension Measuring Instrument. Accuracy of 0.01mm caliper range is 0-200mm

3.2.2 Voltmeter and Ammeter.

Voltmeter accuracy of ±5mV, range is 0-20V; Ammeter accuracy of present current ±(0.3%±30mA)

3.3 Nominal Charged Test Conditions

At20±5℃,the testing process that standards as follows: first 0.5 C5A constant battery charge to 4.20V,when the charge current decreases, then charged to 4.20V constant currect is reduced to 0.02C5A,the charging time is about 3 hours.

3.4 Nominal Discharged Test Conditions

At20±5℃,battery constant discharge to 3.0V,Unless otherwise defined, 30min, rest period after charge,30min,rest period after discharge.

3.5 Battery Performance Test

No Item Standard Test Conditions Test Ways
1 Leakage Test No leakage Typical full charged new battery Standard charge condition,full charge after 60±5℃temperature, humidity 60±10%RH storage one month.
2 Vibration Test 80% Discharge Temperature
3 Drop Test 100% 23℃

Discharge Temperature

After standard charge, the battery is to be tested as following conditions:



Direction: X/Y/Z axis for 30min. The battery is to be tested in three mutually perpendicular to each axis.

95% 45℃
≥90% 2C Dicharge
No electrolyte leakage, smoke Typical full charged new battery
No electrolyte leakage, smoke or explosion Typical full charged new battery Drop the battery in the shipment condition(full- charge)from 1m height onto thicker concrete with p-tile on it 2 times each of obverse.
4 Squeeze Test No electrolyte leakage, smoke Typical full charged new battery Battery placed between two flat metal plate ,applied 13KN(1.72Mpa) force,and continued for 30 min.
5 Short-Circuit Test No explosion,no fire.The temperature of the exterior cell casing shall not exceed 150℃ Typical full charged new battery At normal temperature about 25±5℃,After standard charge, the battery is to be short-circuited by connecting the positive and negative terminals of the battery with copper wire having a maximum resistance load of <10mΩ.
6 Impact  Test No fire, no explosion Typical full charged new battery The battery to be fully charged with standard charging condition, and put a rod with diameter 56mm on the cell, and then heavy block (weight 10Kg) crash on the cell from a certain height(height=100cm).
7 Over-discharge Test No fire, no explosion Typical full charged new battery The fully discharged cell is continually discharged for 2.5hours with 1 C5A current.
8 Prick Test No fire, no explosion Typical full charged new battery The full charged battery with a needle φ3mm at speed 10-40mm/s from perpendicular to the battery plates through (needle stays in the battery)

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