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Lithium Polymer Battery

Lithium Polymer Battery Pack

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Created with Pixso. Home Created with Pixso. Products Created with Pixso.
Lithium Polymer Battery
Created with Pixso. CE Certified 3.7V 400mAh Lithium Polymer Battery Lipo Battery 402540 Size for Humidifier and Beauty Instruments
CE Certified 3.7V 400mAh Lithium Polymer Battery Lipo Battery 402540 Size for Humidifier and Beauty Instruments
  • Name
  • Name
  • Name

CE Certified 3.7V 400mAh Lithium Polymer Battery Lipo Battery 402540 Size for Humidifier and Beauty Instruments

Brand Name: VATS Battery or Netural
Model Number: 402540
MOQ: 3
Price: CN¥6.76-10.35
Delivery Time: 7 work days
Payment Terms: T/T
Detail Information
Product Description
Ratings & Reviews
Detail Information
Place of Origin:
Guangdong, China
Battery Size:
4*25*40mm
Weight:
8g
Type:
Li-polymer
Voltage:
3.7V
Voltage:
3.7V
Capacity:
400mAh
Charge Voltage:
4.2V
Cut-off Voltage:
2.75V
Std. Charging:
0.2C
Max. Charging:
1.0C
Max. Charging:
1.0C
Max Discharge:
1.0C
Max Discharge:
1.0C
Anode Material:
LCO
Anode Material:
LCO
Charging Ratio:
1C
Charging Ratio:
1C
Discharge Rate:
1C
Discharge Rate:
1C
Operating Temperature:
-20~60°C
Operating Temperature:
-20~60°C
Self-discharge Rate:
<3% Monthly
Self-discharge Rate:
<3% Monthly
Supply Ability:
Ships in 7 Business Days (In-Stock) / 30 Business Days (Out-of-Stock)
Highlight:

3.7V 400mAh Lithium Polymer Battery

,

402540 Size Lipo Battery

,

CE Certified Li-polymer Battery Pack

Product Description
CE Lithium Polymer Battery 3.7V 400mAh 402540
High-quality CE certified lithium polymer battery designed for humidifiers and beauty instruments. This 3.7V 400mAh 402540 model offers reliable power with advanced safety features.
402540 Lithium Polymer Battery - Front View402540 Lithium Polymer Battery - Side View
Product Specifications
Product NamePolymer Lithium BatteryModel402540
Voltage3.7VCapacity400mAh
Charge Voltage4.2VCut-off Voltage2.75V
Std. Charging0.2CMax. Charging1.0C
Warranty12 MonthsCertificationISO9001/CE
ApplicationBeauty InstrumentSamplesSupport free samples
Related Battery Products
Battery Quality Features
  • Grade A cells ensuring high and full capacity performance
  • Dual IC chip protection against over-charge, over-discharge, over-current, and short circuits
  • Injection technology for enhanced battery stability
  • Long life cycle for extended product durability
Technical Characteristics
  • Customizable sizes, models and capacities with thickness range from 1 to 12mm
  • Wide capacity range from 15-10000mAh
  • Built-in BMS or PCB protection for over-charge and discharge safety
  • Lightweight design: 1/3 weight of lead acid batteries, 70% size/weight of Ni-MH/Ni-Cd batteries
  • Customizable voltage, capacity, and mating plug/connector options
  • Wide operating temperature range: -20°C to 60°C
  • Steady performance with high power output and low self-discharge rate (<3% monthly)
  • No memory effects with highly efficient charging capability
  • Environmentally friendly green product with no pollution
  • Short delivery times with comprehensive service support
Packaging & Shipping
We offer multiple shipping options to meet your needs:
  • HK UPS: 4-6 days delivery
  • Air Cargo: 7-10 days delivery
  • Sea Shipment: Approximately 1 month delivery
With 10 years of experience and trustworthy forwarder partners, we can arrange sea, air, and express transportation efficiently.
Battery Packaging and Shipping Process
Application Areas
Battery Application Examples
  • Civil consumption: digital cameras, MP3/MP4 players, PDA, electronic dictionaries, e-book readers
  • Electric tools: saws, electric drills, and power tools
  • Small household appliances: portable vacuum cleaners, electric mops
  • Electric toys: remote control toys, model boats and ships
  • Electric vehicles: electric bicycles and cars
  • Lighting: emergency lights, solar lights, LED lights
  • Beauty and health care: electric beauty devices, hairdressing tools
  • Medical devices: portable electronic medical equipment, hearing aids
  • Other applications: instruments, GPS devices, access control systems
Our Certifications
Company Quality Certifications
Company Information
VATS Battery Company FacilityVATS Battery Manufacturing Process
Our Services & Strengths
  • ISO9001:2015 certified factory with strict environmental controls
  • Comprehensive quality assurance using high-quality materials and 100% production inspection
  • Professional R&D center offering customized size, capacity, PCM, wires and connectors
  • Low MOQ with strong production capacity and fast dispatch options
  • Authorized international certifications meeting global standards
  • Excellent service system with quick response times and 12-month warranty
Production Process - Workshop
Battery Production Workshop - Water Purification SystemBattery Production Workshop - Cell Manufacturing
Our facilities include water purification systems, research & test labs, plate workshops, cell workshops, capacity grading stations, and PACK workshops.
Production Process - Equipment
Battery Manufacturing Equipment - Mixing and CoatingBattery Manufacturing Equipment - Formation and Winding
Advanced equipment including mixing LDH-60L, coating machines, calenders, formation/capacity grading systems, auto-injection machines, and winding cell equipment.
Customization Services
We specialize in custom battery solutions. Contact us directly to confirm necessary parameters for a customized battery design.
  • High standard quality management system with ISO9001:2015 and TUV-UL depth certification
  • We provide not only batteries but also comprehensive solutions for our customers
Custom Battery Solutions
Why Choose Us
Benefits of Choosing VATS Battery
Frequently Asked Questions
Q: How about the warranty of li-ion batteries?
A: Warranty of li-ion battery can be as long as 1 year.
Q: Do you have current sample in stock?
A: We usually have stock for battery cells. For battery packs, we can finish samples quickly once order is confirmed.
Q: Can I have a sample order?
A: Yes, we welcome sample orders and offer OEM/ODM services with customization available.
Q: What's the delivery time for mass production?
A: Usually 25-30 days, depending on quantity, material, and battery cell model.
Q: What kind of certificates could you provide for the battery?
A: We can apply for CE, UL, UN38.3 and other certificates. Certificate fees apply for custom designs.
Q: What is your quality control process?
A: We are ISO9001 certified and perform 100% inspection on all batteries before delivery.
Quick Response Contact
Contact: Lynn
Mobile/Skype/Whatsapp/Wechat: +86 13476615395
Tel: 86-0755-86909458
Web: www.vatsbattery.com
Contact VATS Battery for Inquiries
Ratings & Review

Overall Rating

5.0
Based on 50 reviews for this supplier

Rating Snapshot

The following is the distribution of all ratings
5 stars
100%
4 stars
0%
3 stars
0%
2 stars
0%
1 stars
0%

All Reviews

R
Robert T.
United States May 13.2026
Helpful (99)
As a veteran engineer in portable audio and smart hardware R&D, I demand the absolute best in battery electrical performance. We sourced this 103048 3.7V 1500mAh Li-polymer battery for a BT speaker project, and its real-world performance has completely blown us away.
O
Owen
Canada Apr 7.2026
Helpful (86)
I’ve been using this 357090 3.7V 2500mAh lipo battery for a few weeks now, and I’m really satisfied with it. It is steady-quality rechargeable lithium polymer batteries that perfectly match the rated voltage and capacity. Output efficiency is great, which helps me save a lot of working time. Build quality feels solid too, no weird noises or faults during daily operation. Shipping was fast and the packaging was protective. For small-scale battery production and copying work, this is absolutely a practical and cost-effective pick. I’d definitely recommend it to fellow business partners and will consider reordering in the future.
H
Harry
United Kingdom Mar 18.2026
Helpful (90)
I bought these 805050 3.7V 2500mAh lithium polymer batteries to replace the old cells in my Bluetooth speakers, and they work brilliantly. Fit is absolutely perfect, no trimming needed at all. The voltage and capacity are spot on, my speakers now hold charge for much longer than before. Power output is stable, sound quality isn’t affected one bit. They’re well-made and feel really durable. Delivery arrived quickly, items were well packed with no damage. Great value for money compared to local stores. I’ve been using them daily for weeks with zero issues. Would absolutely recommend these batteries to anyone needing replacements for wireless speakers. I’ll be coming back to buy more soon!
Tags: 

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Lipo Battery

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