3.6V 2800mAh Molicel INR-18650-P28A

Molicel INR-18650-P28A

The Molicel INR-18650-P28A  cell comes up with a typical capacity of 2800mAh, the nominal voltage of 3.6V.  This is an absolutely excellent cell for anyone seeking high performance 18650 cells.

HIGHLIGHTS OF Molicel INR-18650-P28A

Typical capacity 2800mAh
Minimum capacity: 2600mAh
Nominal voltage: 3.6V
Standard charge current: 2.8A
Maximum charge current: 6A
Discharge cut-off voltage: 2.5V
Charge cut-off voltage: 4.2V
Maximum discharge current: 35A
Internal resistance( AC 1 KHz): 20mΩ(Max)
Internal resistance DC(DC 10A/1s): 20mΩ
Energy Density Volumetric: 610 Wh/l
Energy Density Gravimetric: 220 Wh/kg

APPLICATION: Cordless screw driver, Cordless drill/driver, Cordless impact driver, Cordless tubing cutter, Cordless angle grinder, Cordless polisher/waxer, Power tool, Electrical vehicle, PHEV.

1.great cycle life
2.High discharge current
3.Fast charge capacity
4.very low inpedance
5.High thermal stability and high reliability


Shape:                    Cylindrical
Can :                        Steel
Diameter :             18.6 mm (Max)
Height :                   65.2 mm (Max)
Weight:                   50 g (Max)

Molicel INR-18650-P26A

Cell Date Code: YMDDSS

Y: indicates calendar year, 9=2009, A=2010, B=2011, C=2012, D=2013,

E=2014, F=2015, G=2016 etc.

M: indicates calendar month, 1~9, 10=A, 11=B, 12=C

AD: indicates calendar date of a month, 01~31

AS: indicates the sequence number in a day, 01, 02, etc

Nominal Specification of Molicel INR-18650-P28A

ltems Specifications Remarks
Rated charge Limiting 2.8A and constant 4.2V charge for 1.5h or 50mA at 23 °C.
Rated discharge Constant 0.56A discharge until 2.5V at 23°C
Rated capacity 2.8Ah (Typical) 2.5Ah (Minimum) Rated discharge capacity after rated charge.
Nominal voltage 3.6V Mean voltage during rated discharge afterrated charge.
Shipping voltage ≥3.45V Nominal approximate state of charge ≤ 30%.
Internal resistance ≤20mΩ Fresh cell measured by AC impedance at1kHz
End of charge voltage 4.20±0.05V -
End of discharge voltage 2.5V Discharge voltage for determination of ratedcapacity.
Charging time 90 min Rated charge.
Maximum chargingcurrent 8.4A -
Maximum dischargingcurrent 35A -
Operatingtemperature Charging 0~60℃ -
Discharging -40~60℃ 20°C-40 ℃ reduced discharge voltage.
Storage temperature forshipping cell <35℃ Recommended temperature less than 23 Cfor long term storage.
Shelf life 1 year -


Standard Test Conditions

1.)  Tolerance on temperatures is ±2 ℃.All tests performed at a relative humidity between 45% and 85% unless noted otherwise.

2.) 3 hours minimum soak time at specified temperature prior to discharging.

3.) The accuracy of measuring equipment (voltmeter and ammeter, etc.) shall be higher than class 0.5.

4.) Standard cycling: 2.8A charge to 4.2V for 50mA and 10A discharge to 2.5V, rest 10 minutes between discharge and charge.

5.) For incoming inspection purpose, the cells should be used in the tests within one week of receipt at customer.

Electrical Performance

ltems Condition Capacity Test Method
Discharge Capacity at 23 ℃ 0.56A ≥2.70Ah Discharge capacity to 2.5V after rated charge
2.8A ≥2.60Ah Discharge capacity to 2.5V after rated charge.
10A ≥2.55Ah Discharge capacity to 2.5V after rated charge.
15A ≥2.50Ah Discharge capacity to 2.5V after rated charge.
20A ≥2.50Ah Discharge capacity to 2.5V after rated charge.
Temperature Discharge Capacity at 2.8A 45℃ ≥2.60Ah Discharge capacity to 2.5V after rated charge at 23℃ .
0 ℃ 2.10Ah Discharge capacity to 2.5V after rated charge at 23℃.
-20℃ ≥2.00Ah Discharge capacity to 2.5V after rated charge at 23℃ .

Cycle Life

Item Condition Test Method
1 23℃ 10A C500 Per 5.1.4, 10A cycling at 23℃ to 500 cycles. The %=(Ah/2.55)*100%

Storage Performance (SOC: State of Charge)

ltem Condition Capacity Retention Test Method
1 23℃ 1 month 30%SOC ≥25% After storage,rated discharge(4.2) and ratedcharge(4.1b) for two cycles. The retentioncapacity (Ah) is defined at 1st discharge after storage. The %=(Ah/2.70)x 100%
2 23℃ 3 months 30%SOC ≥20%
3 23℃ 6 months 30%SOC ≥15%


The precautions described below are important to assure the performance and safety of designed pack. Mishandling may cause cell leakage, heat, smoke, explosion or fire. Please follow instructions carefully.

Intended Use

Cordless screw driver, Cordless drill/driver, Cordless impact driver, Cordless tubing cutter, Cordless angle grinder, Cordless polisher/waxer, Power tool, Electrical vehicle, PHEV.

Handling Precautions


The lithium ion rechargeable cell is to be charged by “constant current/constant voltage” method. The lithium ion cell is charged at a constant current (CC Mode) until the cell voltage reaches a specific voltage, followed by a constant voltage charge (CV Mode) at the specific voltage. The charging current at this constant voltage                       tapers off. As long as the tapering current is down to a particular current, the charge process is deemed complete.

a.Charge voltage:

Do not exceed the specified charge voltage (4.2V per single cell). If the cells are used in battery packs, the maximum voltage is 4.2 x N (N= number of cells connected in series) V.

b. Charge current:

Charge the cell at the specified charge current listed in section 4.10 or less.

c. Charge temperature:

Charge the cell at the temperature range of 0 oC ~ 60 oC. Due consideration should also be given to the arrangement of the battery pack so that it is in that temperature range even though it is effected by heat generated from the cell

 Reverse charging:

The cell must be prevented from reverse-polarity charging.


A lithium ion rechargeable cell starts to discharge at 4.2V and terminates at a cut off voltage of 2.5V.

a.Discharge current:

Discharge the cell at the specified discharge current listed in section 4.10 or less. In case a peak current of higher than maximum discharge current depending on the pulse interval may reduce the cell capacity.

b.Discharge temperature:

Discharge the cell at temperature range from –40oC to 60oC. At a temperature of –30oC or less, the cell will show a significant decrease in discharge capacity.

c. Discharge termination voltage/Over discharge:

Avoid discharge to voltage less than 2.5V per single cell. A leakage current to the equipment may over discharge the cell, which may damage the performance of cell.

charge Characteristics about Molicel INR18650-P28A

How to Custom 18650 Battery Pack

We have the unique ability to develop custom 18650 battery pack to fit your needs. Our expert team of chemists, engineers, and manufacturers who use proven chemistry and production methods that will get from spec to production fast. Slim, flexible, more powerful.


  • Custom Voltage Range: 3V ~ 120V
  • Custom Discharge Current: 0.2C ~ 120C (0.01A-1000A)

  • Custom BMS: Size, Features, Communication, Cut-off, Temperature
  • Custom Battery Size: Starting 0.5mm Thickness
  • Battery Temperature from -40°C–85°C
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  • Custom 18650 Battery Pack, MOQ 100 pcs
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