Energy Storage Battery 48V 50Ah Lithium Battery Pack

SmartPropel Energy Storage System Battery Pack (ESS) is equipped with A grade lithium battery cell, high-quality protection board, and superior accessories. All energy storage batteries can installation flexibility and maintenance-free.

– Capacity, Power, Voltage, and Cell can be customized as your requirement for Min. sample order 1PCS.

– The battery pack will be no fire, no explosion, the protection board plays an important role to prevent over-discharge, over-charge, and short circuit. Highly reduce the safety risk.

– Adopt high-temperature-resistant wire output mode to increase conductor reliability.

– Sheet Metal Shell enhance the battery pack robustness, easy to carry and assemble.

– Battery packs comply with international standards, with stable performance and long cycle life.

– Portable/Metal Case/Protection board/Wonderful/Handle/Durable/Deep Cycle/Long Life/Strong Energy/High efficiency/Rechargeable/Safe/No memory effect/Low self-discharge

HIGH QUALITY RELIABLE BATTERY 3C-20C High discharge rate. High Energy density and stable discharge platform. 1000 cycles, durable for lasting usage. Pass GB/T31415&UL1642&GB31241.


Nominal Voltage48V
Nominal Capacity50Ah
Series and Parallel Connection15S5P
Resistance≤40 mΩ 
Cycle Life2000 cycles @80%DOD
Self Discharge<3% per Month


Dimensions (L x W x H)485*230*240mm
Cell TypePouch Cell 
Case MaterialABS
Enclosure ProtectionIP65


Standard Charge Current≤10A
Max Charge Current≤25A
Continuous discharge current≤ 25A
Pulse discharge current≤50A
Over-discharge protection cut-off voltage37.5V
Over-charge protection cut-off voltage54.75V


Discharge Temperature-4 to 140 ºF (-20 to 60 ºC)
Charge Temperature32 to 113 ºF (0 to 45 ºC)
Storage Temperature77±3 ºF  (25±3ºC)


Certifications for cellCE

More Energy Storage Lithium Battery Models

Energy Storage Battery Pack

Part ESS Lithium Battery Specification

Energy Storage Battery Specification List
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Established in 2015,  SmartPropel is a professional lithium battery manufacturer and energy solution provider.
We strictly control every detail, insisting on not accepting incoming defective materials, not producing defective batteries, or not shipping defective batteries. 
SmartPropel, Propel your smart Life.  


SmartPropel Focus on providing power supply one-stop solution for the worldwide market. Main products include Ebike lithium battery, E-scooter lithium battery, Motorcycle battery, Golf Cart battery, Special equipment battery, Household Energy storage system, Outdoor portable power supply, etc.

SmartPropel R&D team consists of elites with more than 15 years of technical & production experience in the lithium battery industry. With the low-energy, pollution-free production processes, we strictly control every detail in terms of quality inspection.Committed to the development of high capacity, high quality, high-performance lithium battery products.      We have 5 patents for invention and 12 patents for utility models. Advanced technology makes SmartPropel has stronger competition in the international market.

From R&D, production to quality inspection, it has carried out hundreds of simulation calculations and test verification. To realize the consistency, safety and reliability of the final lithium battery pack meet the international leading level.


Safety is the prerequisite and quality is the foundation. We had built a full-featured comprehensive laboratory that integrates capacity testing, short circuit testing, overcharge testing, heavy object impact testing, high & low temperature testing,vibration testing, etc. 

Every batch battery will be tested striclty. No fire, no explosion with stable chemical structure.It ensure the product quality, safety and service life with professional technology and equipment.


SMARTPROPEL meets the requirements to export batteries to worldwide foreign countries.1 year warranty is provided in case any possible problems.Our lithium battery have passed below market main certificates.

  • CE
  • UN38.3
  • MSDS
  • Aviation and Maritime certificate,ect
lithium battery certification


Electric Bike
Ebike Lithium Battery Application
Electric Vehicle (Two-Wheeler & Four Wheeler)
Electric Vehicle Lithium Battery Application
AGV & Energy Storage Battery Product



Collect technical details for further process

How to do

After get inquiry from your side, we will learn more details about your battery requirements and application scenario.


Engineering team evaluate above information

How to do

Our engineers evaluate the technical data provided by customers and work out the mode to design and assemble.


Confirm every details on technical and business

How to do

After customer approval our technical specs and quotation, then we prepare PI for customers to pay for production.


Start production and delivery when they are ready

How to do

We arrange production as soon as receive advance payments and strictly control every production details.


lithium battery cell
Lithium Battery Pack BMS
Lithium Battery Wire & Lithium Battery Plug


Original A grade cell.Best consistency, powerful performance above 2000 cycles. LG,Samsung cells provided, cylindrical/pouch /aluminum cell available.


First level BMS manufacturer, protect battery no fire, no explosion, prevent over-discharge, over-charge and short current. Support Can Communication.


High quality wire & plug which ensure the battery safety & lifespan. Adopt high-temperature-resistant wire output mode to increase conductor reliability.


Adopt waterproof and anti-collision metal shell, suitable for diversity environments. IP65 protection level,which makes the performance of the battery to the utmost.

1 piece sample


Our engineer custom the best solution considering mechanical & electrical concepts. We care with each details: welding, cable, BMS, best insulation processing, etc.


Apply standard modules, from 36V,48V,60V to 72V, diversity models is ready for you to choose for your electric vehicles, which can replace the lead-acid battery directly.


We imported advanced production equipment such as integrated battery cell sorting machine, automatic spot-welding machine, charge & discharge integrated aging tester, etc.

1 Piece

Based on diversity application scenario, capacity, voltage, power and cell can be customized. To enhance cooperation at the beginning stage ,Min. sample order is 1 Pcs.


Q1: Can I get a lithium battery sample for testing?

A:Yes, We offer sample. Standard battery or customized battery can be provided. Once the mass production order is placed, the sample charges will be deducted.

Q2: Can you accept OEM and ODM service?

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

Q3: Can you produce lithium battery pack according to the samples?

A: Yes, we can produce by your samples or technical drawing. We can build the molds and fixtures.

Q4: How do you control your lithium battery products quality?

A: All batteries have 10 steps testing during the whole production, and 100% be tested before delivery.

Q5:What is your terms of packing?

A: Generally, we pack our lithium battery in neutral white boxes and brown cartons. If you have legally registered patent, we can pack the goods in your branded boxes after getting your authorization letters.

Q6: What is your trade terms?


Q7: How about your battery delivery time?

A: Generally, it will take 7-15 days after receive your advance payment. The specific delivery time depends on the items and your order quantity.

Q8: How long will it take for my battery to arrive?

A: Delivery will be made by courier, usually within 10-13 business days to US and EU countries. Some remote areas may take longer. Delivery time may vary for different countries and can take up to 3 weeks. Sea shipping is available.

Q9: What’s your warranty for lithium battery products?

A: Generally speaking, It’s 12 months warranty, for quality problems, we will send you a new one.

Q10: What should you pay attention to when using lithium batteries?

A: Do not knock, puncture, ,modify the lithium battery, do not place it directly under sun or rain for long time, do not overcharge and over-discharge the battery pack, charge the lithium battery with a good quality, matching lithium battery charger.

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7 Points To be Noted For Lithium Battery Pack Customization

Due to the diversity battery application field, lithium battery pack customization is a mainstream trend recently. Through customization, the lithium battery pack can be most suitable according to your space and usage technical requirements. Here SmartPropel listed 7 points that we should concern during customization.

1.Forbidden different types battery cell mixed-use

Different types of battery cell can not be mixed-use, battery structure, chemical composition, and battery performance deviation will lead to a serious potential safety hazard.

2.Forbidden different batch battery cell mixed-use

Different batches of lithium cells should not be mixed-use, which will affect the consistency between the individual battery cell. The products of the same batch are those from the same mixing process, with the same chemical composition and with the closest consistency between the cell monomers.

3.Choose “Top A”  “EV battery level” cell

There are different levels of battery cells, from “A level”, “B level” to “Recycled” battery spread in the market. Even for “A top” battery cells, there are also have different classify, separately for customer products, for ESS, and for EV. The”EV battery level” cell is the best lithium battery cell, for excellent electric c vehicles have high requirements on the consistency, cycle life, and discharge rate. The battery cell is the soul of the battery pack. Only with excellent cells can ensure the battery pack wonderful performance.

4.Select high precise BMS

In order to make sure electric vehicles work well during the operation, the traditional protective board is not enough, except protect the battery no fire, no explosion, prevent over-discharge, over-charge, and short circuits, BMS has further functions, such as heating management, capacity calculation, power detection, SOC&SOH detection, Communication function, system self-check, etc.  High precise BMS will protect the battery well during usage and ensure the battery have a longer cycle life and better performance.

5.Apply high-quality accessories

An excellent battery pack can not exist without high-quality accessories. Adopt high-temperature-resistant wire output mode to increase conductor reliability. Use strong battery bracket and sheet metal shell to enhance the battery pack robustness, IP65 waterproof, easy to carry and assemble.

6.Adopt first-class technology and advanced skills

Make sure the battery cells must be strictly tested and capacity grading before assemble. Introduce high precision electric welding machines, all workers are strictly trained with advanced technology skills for the packing procedure and notes.

7.Comply with international standards

The battery pack should comply with international standards. Ensure the battery pack is assembled with stable performance and long cycle life. All battery packs will be tested at least 48 hours before delivery.

SmartPropel Original Work Writer:Nancy

SmartPropel Lithium Battery
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