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3.7V 4Ah Battery Pack

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unit price: negotiable
min amount:
period for delivery: Consignment Deadline Days
area: Beijing
Expiry date : Long Effective
last update: 2019-09-05 13:56
view count: 55
Company Profile
Product details



1.Your inquiry related to our products or prices will be replied within 24hours in business days.

2. OEM ; ODM are welcomed, OEM brand or packing boxes are available.
3. Any defective products within warranty will get maintenance or replacement unconditionally.
4.High-efficiency after-sale without complex process.


1. Before Delivery, we make sure 100% full inspection. In case any defective ,we'll replace it for free immediately or with new shipment.
2. Generally we supply 1-year warranty. Any defective products please send us pictures or videos or defective samples. We'll check it and replace it free. But the warranty doesn't cover any damaged products caused by improper use.




Product Type

18650 3.7V 4000 mah battery pack

Shell Color

Yellow + Black

Label Capacity

4000 mah


Lithium Ion


Cylindrical rechargeable lithium battery

Product Size

6.5(H) x 1.8(Dia) cm

Gross Weight


Charging Cycles


Suit for

headlamp,flashlight,bicycle light,diving flashlight,cameras, toys and many other electronic devices

Product Advantage

High capacity, high energy density and lower weight than other types of 3.7V China Best Battery
Low Discharge rate, No memory effect.
Low reoccuring operation cost.
Environmental friendly.
With protective board, Anti-overcharge and anti-overdischarge, using safety.

About US:

Shenzhen Richroc Electronic Co., Ltd. was established in 2009, it is located in Shenzhen city, Guangdong Province. Our company is a high-tech enterprise that produces high-performance li-ion batteries and related products.

Our batteries have excellent performance on safety, stability, consistency, cycle life, high &low temperature performance, sell-discharge and capacity. It is widely used in many areas like mini UPS, storage energy, solar power system, and digital products. Currently we have got the certificates of CE, ROHS, FCC.

Nowadays, our batteries already won a good reputation for quality and service in global market. Richroc is committed to provide the best quality, service and solutions for customers to create more value. We are welcomed ODM/OEM customers and hope we can be win-win strategic partners.


1. Q: Do you have higher voltage ?

A: Yes, we can make it based on customer needs, please let us know your request.

2. Q: Do you accept OEM?

A: Yes.

3. Q: What’s the warranty?

A: 12 months.

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