Quick Details

  • Place of Origin: Guangdong, China (Mainland)
  • Brand Name: Eastar
  • Model Number: 18650 Battery Pack
  • Type: Li-Ion
  • Nominal Voltage: 12v
  • Size: 55*20*136mm
  • Nominal Capacity: 4ah
  • Available Voltage: 24v/36v/48v
  • Available Capacity: 10ah/15/15ah/30ah/80ah
  • Chager: Available
  • Battery Cell: Samsung/ LG/ Panasonic
  • Certification: CE/ROSH/UL/MSDS/UN38.3
  • Warranty: 1 year
  • Cycle life: 1000 Times
  • Application: E-bikes, E-scooters, E-vehicle
  • Battery type: 18650 Li-ion Battery Cells
  • keywords: lithium ion battery

Packaging & Delivery

Packaging Details Wholesale price rechargeable 12v 4Ah lithium ion battery for medical machinery
pp bag with carton or customized.
Delivery Time shipping in 7-15 work days after payment

Wholesale price rechargeable 12v 4Ah lithium ion battery for medical machinery




1Lasted in this field of battery for 18 years
2Never exaggerate battery capacity
3Battery management systems/PCMs are with the same quality as Seiko
4Finished battery safety performance could reach UL, CE, KPS, KC, etc. testing standard  
5Got ISO9001-2008 quality system certification 
65S factory with dust-free workshop 
7Process design far exceeds battery industry standard 
8100% quality inspection 100% quality inspection 
9One year warranty, 24 hours online service
10Professional of ODM & OEM
Product Description

Technical Parameters


Model Lithium Ion Battery
CellCell model18650-3.7V-2000amh
rated voltage3.7V
Typical Impedance≤12mΩ
Battery materialNMC cathode material
Battery PackCombination method4S2P
Minimal capacity4Ah
Nominal voltage12V
Max. charge voltage14.4V
Discharge cut-off voltage≤31V
Max Charge current2Ah(0.5C)
Max Working current6Ah(1.5C)
Standard charge current0.2C
Standard working current0.5C
Pack Impedance standard≤150mΩ
Max. dimension(L×W×H)(mm)65*150*430
Operating temperatureCharge temperature0℃~45℃
Discharge temperature-10℃~55℃
Batterty manager systemSingle cell over-charge cut-off voltage4.2V
Single cell under-discharge cut-off voltage2.75V
over-charge release voltage4.1V
Discharge release voltage3.0V
Over-discharge cut-off current52A
Over-discharge cut-off current delay1.5S
Short-circuit protection150A
Products Details

Products Photos



Company Information

About Eastar Battery


Shenzhen Eastar Battery Co., Ltd was set up as a manufacturer of various batteries in 1997. Our main products include dry batteries ( carbon & alkaline), lead-acid batteries(General batteries, Auto batteries), Ni-MH/Ni-CD batteries and packs, Lithium batteries ( Li-ion, Li-PO). 

Quality is our life
As a battery manufacturing group, we have separate factory located in Guangzhou, Shenzhen and Xingfeng for different battery types. We invested much on the advanced production facilities and testing equipments. We have a powerful R&D and skillful worker group. Based on ISO9001, we built up a complete quality control system. 


The best services to you
1 year Warranty

ODM & OEM service

24 hours online service




Delivery and Payment

Safe Payment Best Delivery



1.  Q: Can you accept OEM and ODM Service?

      A: Yes, we supply OEM&ODM service as clients requirement.


2.  Q: Can we get samples for test?

     A: Yes, we offer sample, but free samples are not available at beginning.


3. Q: What’s your payment term?

     A: TT, L/C, West Union, Paypal etc.


4. Q: What's your warranty for products?

     A: Generally speaking, it's one year's warranty, for quality problems, we will send you a new one.


5. Q: How long will be the delivery?

     A: Usually delivery in 7-15 days, but could be change according to the quantity or other things.


6. Q: How do you control your product quality.

     A:  All batteries have 10 steps testing during the whole production.

Contact Us

Contact Us

Mark chan

Shenzhen Eastar Battery

Phone: +86 15671606270(Wechat&Whatsapp)

Tel: 0086-755-22214430

Web: www.eastarbattery.com


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