How to maintain the battery?

The battery should be stored in a clean, dry, ventilated, dark environment when not using. Keep it after full charge, recharge it every 3 months or 6 months.

What about after-sale service?

We will offer you 1 year guarantee. If there are any problems, please inform us, we will offer you positive solutions. Besides, we also have office and warehouse in US/Germany, can give you better after-sale service.

Can you provide OEM and ODM service?

Yes, We are a professional Electric Bike Battery manufacture with factory, which produce all kind of high quality Ebike lithium batteries as customers' requirements and designs, welcome to place OEM and ODM orders and visit our factory.

What is the difference between Li-ion, Ni-MH, and Lead acid batteries?

Ebike Li-ion battery have longer cycle life, normal cycle life is 600-800 times, and also with light weight, small size, No memory effect, Nontoxic, environmental.

Waterproof 72V 40ah Lithium Battery Pack Wholesale

Name: Waterproof 72V 40ah Lithium Battery Pack Wholesale
Brand: Nantong Ningyuan Automation Technology Co., Ltd.
SKU: 2299975125

Jiangsu, ChinaNantong Ningyuan Automation Technology Co., Ltd.

US$250.00-300.00

10 Pieces

Product profile

Customization

Available

Type

Lithium-Ion Battery Pack

Connection Mode

Series and Parallel

Model NO.

7240

Rechargeable

Chargeable

Discharge Rate

Size

370*280*160mm

Accessories Type

Battery

Rated Capacity

40ah

Standard Voltage

76.8V

Usage

Electric Motorcycle

Electrolyte

Li-ion

Cycle Life

2000times

Capacity

40h

Charge Current

≤30A

BMS

Smart BMS with RS485 Can

Case

Iron Case/ Customized

Discharge Port

50A Anderson

Discharge Current

Max 80A

Weight

28kgs

Transport Package

Carton with Foam

Specification

1pcs one carton

Trademark

Origin

Jiangsu

HS Code

8507600090

Production Capacity

1000PCS/Months

Key features

High Energy Density: Provides longer battery life and increased product durability.

High Power Output: Delivers larger output current to meet high usage needs.

Smart BMS Protection: Includes SEIKO IC BMS to prevent short circuit, overcharge, and overcurrent.

Long Cycle Life: Expected to last 800-1200 recharge cycles, approximately 2-3 years.

Customizable Case: Case material can be customized to Iron Case or other options.

Fast Delivery: Electric bike batteries sent out within 5 days after order confirmation.

Comprehensive Warranty: 1-year guarantee covering capacity drop below 80% of initial capacity.

OEM/ODM Services: Professional manufacturing with full customization and design support.

Company profile

Years of Export Experience100% Finished Products InspectionProduction Process VisualizationManagement Certification

Nantong Ningyuan Automation Technology Co., Ltd.

Jiangsu, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 13 Years CertifiedNearest Port: Shanghai PortAverage Response Time: ≤2.47h

AI-Powered supplier vetting

SummaryNantong Ningyuan Automation Technology Co., Ltd. is presented as an R&D-oriented Li-ion battery innovation enterprise with one production line and export experience spanning 12 years. It provides sample-based, minor, full, and flexible customization, as well as ODM and OEM services for well-known brands. Production and service controls include written procedures for inspection, corrective and preventive actions, customer complaints, and supplier assessment. The supplier reports inventory capability, valid contracts with associated subcontractors, and lead times within 15 working days in both peak and off-peak seasons. However, it lacks an available SDK, overseas warehouses, overseas showrooms, overseas agents or branches, and documented R&D design-input/output/review/verification/validation records. No certification information or specific customer case details are provided. Financial information is present only as year references, so financial credibility cannot be determined.

Supplier typeThe supplier is identified as Nantong Ningyuan Automation Technology Co., Ltd., an innovation enterprise focused on the R&D and application of Li-ion batteries. It operates one production line and serves export markets in South America, Southeast Asia/Mideast, Europe, and North America.

After-Sales capabilityThe supplier has written procedures and records for handling customer complaints and corrective/preventive actions, and accepts multiple service payment terms. However, it has no overseas warehouse, overseas showroom, overseas agents, or branches, which limits documented overseas service infrastructure.

R&D capabilityThe supplier reports new products during the past year, ODM capability, and R&D software skills in AutoCAD, Pro/E, and SolidWorks. Its R&D documentation is not available for audit, and no SDK is available, so the evidence supports active design capability but not a fully documented or software-enabled innovation system.

Production capacityThe supplier operates one production line, reports inventory capability, valid contracts with associated subcontractors, and lead times within 15 working days in both peak and off-peak seasons. Written procedures cover finished-product inspection, supplier assessment, quality assurance, complaints, and corrective actions, while export experience is stated as 12 years.

Customization capabilityThe supplier explicitly offers customization from samples, full customization, minor customization, and flexible customization. It also provides ODM services, indicating capability to support both modification and original product design requirements.

Product Q&A

Q:Are you a factory?

Yes, our factory is in Jiangsu, China. Specializing in rechargeable batteries, lithium ion batteries, lithium batteries, power batteries, and chargers for more than 10 years.

Q:Do your e-bike batteries come with a charger?

All of our e-bike batteries come with a charger. We have normal chargers and fast chargers. If you need a fast charger, please contact us.

Q:Do your electric bike batteries come with a BMS?

Yes, our batteries all come with SEIKO IC BMS, with stable performance. It can protect the battery from short circuit, overcharge, overdischarge, and overcurrent.

Q:What is your delivery date?

Electric Bike Battery will be sent out within 5 days after confirmed order. Shipping will cost 3-15 days, it depends on quantity and which battery you need.

Q:How long is the battery expected to last?

The battery should have around 800-1200 recharge cycles, about 2-3 years. Its capacity diminishes over time; when it goes down to 75%, you should replace it. The more you use the bike, the better the battery retains its capacity.