52V 40Ah Rechargeable Lithium Ion Battery Pack 21700 4.5Ah Cell

18650 Li-ion batteries are the battery of choice when designing for higher voltage and current requirements. Li-ion have relatively low self-discharge rates, and are capable of high discharge currents and better performance than nickel and lead based batteries.

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Electric bicycle

Electric motorcycle

Electric tricycle

Electric boat


Energy storage

RC toy

Led light

Street light


Medical Equipment



Customized battery pack service are warm welcome, which is one of our best advantages. 

Battery cell can be choose for China brands or LG SAMSUNG SONY PANASONIC

BMS parameter could change based on application

Design battery size and solution in free service

Buyer advise connector type in order to assembly accordingly.

VODNO provide specification of battery and help to get certification.




Nominal voltage




Minimum: 39.5Ah

Operation voltage


End of charging:59V±1V

End of discharging:39.5V±1V




Approx. 10 kg

Standard charge method


Constant current and constant voltage (CC/VV), current is 20A, voltage is 58.8V±0.5V, cut-off current is 0.8A.


Max.continuous charge current



Standard discharge


current=40A,cut-off voltage 39.5V±1V


Max.continuous discharge current


≤ 90A

Max.pulse discharge current


180A (5S)

Cycle life

500 cycles

Protection functions


Protection of short-circuit      (500µs)

Protection of over charging     (4.25±0.25V)

Protection of over discharging  (2.8±0.1V )

Protection of over current       (360A / 20ms)

Protection of high temperature  (75±5℃)

Connecting plug

XT90 (mother),length of wires 8#: 200mm

Packing material

Epoxy resin board

Operating Temperature


Charge: 0 to 45℃         

Discharge: -20 to 35℃      

Storage Temperature


1 month: -10 to 45℃        

3 month: -5 to 35℃         


What is your application ? Waiting for your awesome a new project. 


About Us

Vodno Technology Co., Ltd. was founded in 2010, the predecessor of the lithium material, electric bike battery, and the core production-based manufacturers, after nearly seven years of development, has developed into a product design and development, battery solutions and electronic circuit program Design, battery production and quality control, sales in one of the high-tech Co., Ltd., and become the battery industry's leading enterprises. Vodno take a senior engineer of the engineering and technical team as the core,after the years of practice summed up a set of highly efficient and accurate design standards and production management practices to ensurethat each design, each product is uncompromising attention to excellence. "Treat every client with sincerity, implement every promise" is Vodno's corporate culture, scientific management, rigorous attitude, high-quality elite to Vodno brought rapid growth, won the recognition of overseas customers around the world.Now, Vodno Technology Co., Ltd. has more than 20 countries and regions around the world with a number of well-known enterprises to cooperate, many of them like "Foxconn" the world's top 500 enterprises, and most products have been CE, ROHS, UN, etc. International Standard Certification. Today, Vodno has grown into a trusted gold supplier in the battery industry.


Q1 . How to proceed an order for Battery

Al : Firstly , pls let us know your requirements , such as the dimension , continuous & peak dischargecurrent , application of thebatterySecondly , pls let us know the purchasing quantity and when will your project start . We quote accordingto the detailshirdly customer confirms the price , sample and places deposit for formal orderourthly We arrange the production

Q2 : How to deal with the faulty ?

A2 : Firstly , Our products are produced in strict quality control system and the defective rate will be lessthan 0 . 2%Secondly , during the guarantee period , we will send new batteries with new order to replace thedefecthirdly , we will test the defective batteries and make 8D report . We will find out the reason and proposeprovement measures for future production

Q3 : Do you support door to door shipping ? drop ship

A3 : Yes . If battery unit weight is below 30kg , we can delivery it via Air Express . If battery unit weightabove 30ka , wedelivery it via sea . If you want to us to help you to make custom clearance , we would like to do that . Wesupport drop ship

Q4 Does your battery include BMS ? Can we use it for vehicle ?

A4 : Yes , our battery pack include BMS , you can use it for low speed vehicles And make sure thedischarge current can meet thapplication request . If you want to use standard vehicle , please inform us , we need to adopt morecomplex design BMS and differenttechnology solution.

What is Your Application?Talk to us, Vodno Battery Experts will offer you a best solution

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