DIY Custom Size 24V 36V 48V 52V 60V 72V Waterproof 18650 2600MAH 3500MAH 21700 5000MAH Lithium Battery Pack 10AH 20AH 30AH 40AH Varying Capacities

Return and Refund Policy
We offer a 15-day return policy from the date of delivery. To be eligible for a return:  
- Items must be unused, undamaged, and in their original condition.  
- All original packaging and accessories must be intact and complete.  
- Proof of purchase (receipt or order number) is required.  
- Custom-ordered or personalized items are not eligible for returns.
- Contact our customer service at jdpower@stdbattery.com to Request a return authorization.  

Warehouse-Specific Shipping Details:
US Stock: - Free standard shipping within continental USA (Delivery time: 3-7 business days)
- Additional charges apply for Hawaii, Alaska, and Puerto Rico
UK Stock: - Free domestic shipping within UK (Delivery time: 1-5 business days)
UA Stock: - Free domestic shipping within UA (Delivery time: 3-7 business days)
China Stock:
- Free shipping to most countries including USA, UK, Canada, Australia, and EU nations
- EU coverage includes: Austria, Belgium, Bulgaria, Cyprus, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, and other member states
- Delivery time: 10-20 business days
All battery products include free shipping with no hidden charges. For special shipping requirements or remote area deliveries, please contact our customer service team for assistance.

Q: What type of this battery?
A: It is li ion battery,Chemical is Li(NiCoMn)O2.   Li-ion battery have longer cycle life,normal cycle life is 800-1000 times, and also with light weight,small size, No memory effect,Nontoxic, environmental friendly.
Q: What kind of cells used on this battery?
A: Different capacity with different cells, we make the battery with original A grade Samsung,Panasonic,Sanyo,LG and high quality domestic cells,all can be customized as your requests.
Q: Do your battery come with charger?
A: We have normal charger and fast chargers(2A, 3A, 4A, 5A).   If you need charger please contact with us.
Q: Do your battery come with BMS?
A: Yes, Our batteries all with SEIKO IC BMS, with stable performance.   Which can protect the battery avoid short circuit,Overcharged,Over discharge and Over current.
Q: How can we guarantee quality?
A: Always a pre-production sample before mass production;   Always final Inspection before shipment 100% testing and inspection to ensure the quality.
Q: Do you have MOQ limit?
A: Yes, we have MOQ limit for mass production, but it depends on battery model.   Please contact us for details.
Q: How about the lead time?
A: Samples will takes 3-7 business days.   Mass production will takes 10-30 days.   It depends on quantity.
Q: Can you provide OEM and ODM service?
A: Yes, We are a professional Battery manufacture with factory, which produce all kind of high quality lithium batteries as customers' requirements and designs, welcome to place OEM and ODM orders and visit our factory.

• We provide a one-year warranty for all e-bike batteries, power tool batteries, and custom batteries.

• If any battery develops quality issues within one month, we can process a return and refund or replacement upon verification of the issue.

• After one month, we can send you a BMS or battery cells for repair, or you may return the battery to us for servicing.

• All our e-bike batteries and power tool batteries are equipped with high-quality cells and BMS, and undergo 100% testing before shipment.

• Our global after-sales service centers are located in the United Kingdom and Los Angeles, USA.

• If your battery malfunctions within the warranty period, please send it to the nearest service center. We will repair it and return it to you.

• Do not immerse the battery in water or seawater, keep the battery stands by in a cool dry surrounding.

• Does not use or leave the battery near a heat source as fire or heater.

• Use the battery charger specifically for that purpose when recharging.

• Do not upside down the position and negative terminals.

• Do not connect the battery electrodes to an electrical outlet.

• Do not discard the battery in fire or a heater.

• Do not short-circuit the battery by directly connecting the positive and negative terminals with metal objects.

• Do not transport or store the battery together with metal objects such as hairpins, necklaces, etc.

• Do not strike, trample or throw the battery.

• Do not directly solder the battery and pierce the battery with a nail or other sharp objects.

Dongguan Junda New Energy Technology Co., Ltd.

Junda Battery specializes in the custom design and manufacturing of industrial and consumer batteries. Our product range includes e-bike batteries, lithium-ion batteries, lithium polymer batteries, LiFePO4 batteries, NiMH batteries, nickel-cadmium batteries, and more. We provide a wide array of standard and customized battery solutions for diverse industries, such as power tools, cordless phones, tablets, GPS tracking, marine, medical, oil and gas, recreational vehicles, security and surveillance, solar energy, telecommunications, and solar systems.  

With a professional design and development team, we deliver reliable battery application solutions. We collaborate with major distributors and companies across multiple countries, including the United States, Canada, the United Kingdom, France, and Italy, leveraging extensive experience to serve your needs.  

We focus on high-quality, safe, and reliable products to help our customers develop innovative products and sustain rapid growth.   Please inform us of your specific requirements, such as voltage, capacity, shape, dimensions, and operating current.   We can customize batteries to meet your needs and provide samples for quality testing.   Feel free to contact us for specifications and quotations.

Advantages:
1.   OEM & ODM manufacturer supporting diverse designs.
2.   Reliable quality, competitive pricing, fast delivery, and premium service.
3.   Sturdy packaging, stable shipping, and 100% testing and inspection before shipment to ensure quality.
4.   Compliant with certification standards including CE, UL, RoHS, UN38.3, and MSDS.

Custom Battery Project:
1. Custom Li-ion Battery 3D Drawing
2. Battery Management System Design
3. Customized Waterproof Battery
4. Customized high and low temperature battery
5. Customized fast charge Battery
6. Customized high rate discharge Battery
7. Customized battery pack voltage capacity discharge rate
8. Custom battery pack cables, terminals
9. Customize Explosion-proof Battery (EX ia/ib IIA/IIB T1-T4)
10. Maximum Reliability + Maximum Safety