Product Description

Battery name	21700 cylindrical lithium ion battery
Battery Model	INR21700
Battery specifications	21 * 70 (mm)
Battery material	Li-ion Lithium Ion Battery
Battery voltage	3.7V
Max. charge voltage	4.25V
Instantaneous discharge current	60A
Continuous discharge current	30A
Battery internal resistance	<10mΩ
Nominal capacity	4000mAh
Charging temperature	0 ~ +60 ° C
Discharge temperature	-20 ~ +60 ° C
Battery characteristics	large discharge current and high capacity.
Battery weight	71±1.5g
Charging and discharging standard	more than 500-1000 times
Charging cut-off voltage	4.2v
Discharge cut-off voltage	2.5V

High Quality:

* 100% pre-tested before leaving the factory

* Specialized manufacturer with more than 10-years experience

* Excellent customer service and technical support * Strict quality control system and professional R&D department.

Sample Policy:

*We support sample services.

*New sample as per requests:

The sample is specially made as per your request. And the charges will be collected based on practical expense accordingly.

*Sample lead time: Ready sample in stock will be sent out within 1-2 days. New sample will be sent out within 7 days upon confirming the deposit and artwork.

*Freight: Freight charge collected.

*How to order:

1.Send Inquiry-Professional.

2.Confirm the price, lead time, payment term etc.

3.Customer make the payment for deposit and send us Bank slip.

4.Initial Production Stage-Inform the clients that we have got the payment,And will make the samples according to your request, send you photos or Samples to get your approval. After approval, we inform that we will arrange the production & inform the estimated time.

5.When mass goods production finished, products photos and samples will sent to you for approval. You can also arrange the third party Inspection .

6.Clients make payment for balance and we Ship the goods.

7.Order can be say “finish” when you receive the goods and satisfy with them .

8.Feedback to US about Quality , Service, Market Feedback & Suggestion. And we will do better.

Company Profile

Our Advantages

Package & Shipment

Company Profile

Baidun, we are an enterprise integrating design, development, production and sales. Focus on Lifepo4 battery for 12 years. The main products are lithium iron phosphate batteries for solar energy storage systems, lithium titanate batteries, ternary lithium batteries, battery packs, portable power supplies, household energy storage, commercial off-grid energy storage and solar system chargers.
The product application covers the three major fields of "power, consumption and energy storage". Widely used in: various electric vehicles, photovoltaic energy storage, household energy storage, signal systems, emergency lighting systems, security systems, communication equipment, solar and wind energy storage systems, backup power supply for fire equipment, UPS (uninterruptible power supply), outdoor Lighting, portable digital products and other industries.
We always adhere to the business philosophy of high safety, high quality and environmental protection as our core values. Provide customers with the best overall power solutions, OEM/ODM services and comprehensive after-sales support to meet the different needs of customers! Integrity and professionalism, this is also our responsibility!
Baidun, always here, is your sincere partner for the success of your career!

FAQ

1. Where is the main market of BAIDUN?
With many years of experience, we work with many clients all over the world. Mainly from the top 3 markets are North America, Europe and Asia, with a few other countries.

2. How to calculate the shipping cost?
Please contact us before placing an order, we will calculate the specific shipping cost according to different countries, different zip codes and different order weights. We will provide you with the best shipping methods and accurate shipping rates.

3. What can you buy from us?

Lithium battery, battery pack, charger, photovoltaic off-grid energy storage system

4. The battery is so heavy, is it easy to break on the road?
This is also a matter of great concern to us. After a long period of improvement and validation, our packaging is now very safe and reliable. When you open the package, you will definitely feel our sincerity.

5. What services can we provide?
Accepted delivery conditions: FOB, EXW;
Accepted payment currencies: USD, EUR, JPY, CAD, AUD, HKD, GBP, CNY, CHF;
Accepted Payment Types: T/T, L/C, Credit Card, PayPal, Western Union, Cash;
Language: 19 languages

6. The delivery time set by your system is 15 days, do I really need to wait that long?
No, if it's not a custom order, we usually ship it out within 7 business days.

We provide one-stop battery power solutions, including cell selection, battery pack design, PCM/BMS design, battery pack assembly, OEM packaging and after-sales service.

Customer first
24-hour online service to solve any order problems for you!