3.7V Sanyo UR18650W2–15A High Drian


Sanyo UR18650W2 cell is a wonderful lithium ion cell with  minimal nominal capacity of 1500mAh and nominal voltage of 3.7V.  Many electric devices can be powered by Sanyo UR18650W2 cells like power tools. It has stable discharge voltage and light weight as well as high discharge current of 15A. This is a top-in class choice in 18650 cells.


  • Positive Terminal: Flat Top
  • Nominal Capacity: 1500mAh
  • Nominal Voltage: 3.7V
  • Internal resistance:≤50mΩ
  • Max Continuous Discharge Current: 15A
  • Charging Method: CCCV(Constant Current Constant Voltage)
  • Charging Voltage: 4.2V
  • Charging Current: std.1050mAh
  • Charging Time: 3.0hrs.
  • Energy Density: 333Wh/l     120Wh/kg

APPLICATION:E-cigarettes, vacuum cleaning appliaction, electric tools, cordless Power Tools, RC model, e-bike, etc.


1.) high capacity
2.)High Discharge C-rate: 15A
3.)light weight, small size and high performance
4.)small internal resistance
5.)outstanding discharge  properties and storage Capacity
6.)Environment friendly
7.)long cycle life
7.)none memory effect


Shape:                    Cylindrical
Can :                       Steel
Diameter :            Max. 18.50mm(with tube)
Height :                 Max. 65.10mm(with tube)
Weight:                 Max.47.0g

Outline Dimension of UR18650W2

Nominal Specification of UR18650W2

Item Specifications Notes
Nominal Capacity 1500mAh -
Nominal Voltage 3.7V -
End Voltage 2.75V -
Charging Curent (Std.) 0.7C(=1.05A) 0~+40°C
Charging Voltage 4.20v -
Charging Time (Std.) 3.0 hours -
Discharge Current(std.) 1C(=1.5A) -20~+40°C
Discharge Current(max.) 15A -
Internal Resistance ≤ 50mΩ AC impedance 1 kHz
Weight ≤ 47.0g -
Surroundings Temperature range for shipped battery ≤ 1 month -20 ~ +60°C Percentage of Recoverable Capacity: 80%
≤ 3 months -20 ~ + 40°C
≤ 1 year -20 ~ + 20°C


※1 Nominal capacity is measured by the discharge at 0.2CA to 2.75V end voltage after fully charged according to specification at 25°C.

※2 Discharge at high rate or high temperature frequently, battery life will be shorten.

※3 The maximum discharge current for a single cell use. However after the battery pack assembly , there will be a limitation of maximum discharge current due to a protection circuit or a protection device.

※4 Percentage of recoverable capacity = (Discharging time after storage / Initial discharging time) ×100     

The discharging time is measured by the discharge current of 0.2CA to 2.75V end voltage after the battery is fully charged at 25℃.

Electrical Characteristics Tests

Item Conditions Criteria
Full Charge The charger supply 0.7C(=1.05A) constant current until battery voltage reaches 4.20V, then be changed at constant voltage of 4.20V while tapering the charge currnt. Charging time is 3.0 hours in all. Charging temperature is 25℃. -
Capacity ①Within 1 hour, after fully charged at 25℃, discharge with 0.2C(=0.3A) continuously to 2.75V of end voltage at 25℃.
②Within 1 hour, after fully charged, discharge with 1.0C(=1.5A) continuously down to 2.75V end voltage at 25℃
≥ 300min.

≥ 54min.
Cycle Life A battery unit shall be repeated 300 charge/discharge cycles, charged at CCCV(1.05A-4.20V) for 3.0hours, discharged at 1.5A TO 2.75v end voltage. After 300 cycles, discharging time is measured. ≥ 38min.
Temperature Characteristics ①Within 1 hour, after fully charged at 25℃, the battery is stored at 0℃ for 3 hours. Discahrge time is measured by discharging with1.0C(=1.5A) continuosly down to 2.75V end voltage at 0℃

②Within 1 hour,after fully charged at 25℃, the battery is stored at 60℃ for 3 hours.Discahrge time is measured by discharging with1.0C(=1.5A) continuosly down to 2.75V end voltage at 60℃
≥ 35min.

≥ 50min.
Storage at Fully Charged State ①After fully charged stored for 10 days at 60℃ and rested at 25℃ for 3.0hours. Discharge time is measured by dischargeing with 1.0C(=1.5A) continuously down to 2.75V end voltage at 25℃.

Then next discharge time is measured as specified in paragraph 4.2.②.

After fully charged, stored for 20days at 60℃ and rested at 25℃ for 3.0hours. Discahrge time is measured by discharging with 1.0C(=1.5A) continuously down to 2.75V end voltage at 25℃.

Then next discharge time is measured as specified in paragraph 4.2.②
≥ 35min.

≥ 45min

≥ 30min.

≥ 40min
Storage at FullDischarged State After fully charged and discharged as specified in paragraph4.2.②.then store for 20days at 60℃ for 3.0hours. Discharging time is measured as specified in paragraph 4.2 ≥ 50min
Drop The cell is freely dropped 6 times from a height of 1m onto a flat surface of hard wood. No rupture,
no fire


The testes shall be implemented with new batteries that were delivered within the last 7 days. The tests shall be performed at 25±2 ℃ (The standard temperature of second grade is specified by JIS Z 8703 (Standard Test Conditions)), 65±20 % (The standard humidity of twentieth grade is specified by JIS Z 8703 (Standard Test Conditions)). The grade of voltmeter and ammeter in the tests shall be higher than Class 0.5 which is specified by JIS C 1102 (Electric Indicator).

Charge Characteristics about UR18650W2
Discharge Characteristics (by rate of discharge)
Discharge Characteristics(by temperature)


Storage Measures For Factory

1.Cell or battery warehouses should be set up independently.
Set up “No Fireworks” eye-catching signs in storage places.
It is strictly forbidden to stack combustibles and flammable items around.

2.The temperature of cell or battery warehouses should be controlled within the range of 20±5℃,
The maximum should not exceed 30℃,
The relative humidity should not be greater than 75%.
Keep the warehouse clean, dry and well ventilated, and do not store other items.

3.Cell or battery warehouses should be equipped with smoke and temperature alarm devices, and the alarm signal should be transmitted to a place where someone is on duty 24 hours a day.

4.Cell or battery warehouses should be equipped with independent external accident exhaust devices.
The accident exhaust devices should be interlocked with smoke and temperature alarm devices.

5.Cells and batteries should be neatly placed, not stacked too high, and storage facilities should be made of non-combustible materials, and anti-static measures should be taken.

6.The positive or negative pole position of each battery (cell) must be insulated to prevent short circuit protection measures.

7.Automatic sprinkler facilities should be set up in the battery warehouse.

8.The battery must not be stored at full capacity, and it is recommended to store it at 50% power.

9.Semi-finished batteries should be equipped with protective plates.

10.Waste batteries should be stored separately after being discharged.

11.Each fireproof zone of the battery and cell warehouse shall not exceed 250 square meters.

12.A sufficient number of spherical dry powder automatic fire extinguishers or sprinklers should be hung in the battery and cell warehouses.

13.The battery and cell warehouses should be equipped with 2 fire blankets each, and 1 special bucket for handling accident batteries.

1.Explosion-proof electrical equipment should be used in battery warehouses and aging rooms.
2.Faulty batteries and waste batteries must be placed in special treatment cabinets for isolation and disposal, and the use of explosion-proof sand buckets to deal with accident batteries is advocated.

Storage Measures For Daily Lithium Battery Users

1. For Lithium-ion batteries which need to be stored for a long time and not used, they should be kept in a state of 50%-60% charge. They should be recharged every 3 months and recharged every half a year.

2. Attention should be paid to moisture-proof and moisture-proof, to prevent squeezing, collision, etc., to avoid battery damage.

3. It is forbidden to use or place the battery at high temperatures (in hot sunlight or in very hot cars), otherwise it may cause the battery to overheat, catch fire or fail in function, and shorten its life.

4. It is forbidden to store in places with strong static electricity and strong magnetic fields, otherwise it will easily destroy the battery safety protection device and bring unsafe hidden dangers.

5. If the battery emits an odor, fever, discoloration, deformation, or any abnormality during use, storage, or charging, immediately remove the battery from the device or charger and disable it.

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
  • Custom Connector: JST/Molex/Hirose/Anderson/TE/Amphenol  Etc


  • Custom 18650 Battery Pack, MOQ 100 pcs
  • Custom Samples as fast as 3 Days
  • Strict Quality Control, No Safety Concerns Ever
  • Instant Customer Support, Solve Any Problem in Time.
custom lithium battery packs collection

custom lithium battery packs collection