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Shenzhen Vats Power Source Limited

  • China,Shenzhen ,Guangdong
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China 402040 300mAh 3.7V Reliable Li‑Polymer Rechargeable Battery Cell
China 402040 300mAh 3.7V Reliable Li‑Polymer Rechargeable Battery Cell

  1. China 402040 300mAh 3.7V Reliable Li‑Polymer Rechargeable Battery Cell

402040 300mAh 3.7V Reliable Li‑Polymer Rechargeable Battery Cell

  1. MOQ: 10
  2. Price: $0.91-1.28
  3. Get Latest Price
Supply Ability Ships in 7 Business Days (In-Stock) / 30 Business Days (Out-of-Stock)
Max Charge Voltage 4.2V
Battery Size 4.0±0.2 * 20±0.5 * 40±2.5 mm
Delivery Time 7 work days
Payment Terms T/T
Discharge Rate 0.5C
Cycle Life 500 charge cycles
Voltage 3.7V
Capacity 300mAh
Packaging Details Industrial cartons compliant with air & sea shipping standards
Model Number 402040
Certification UL1642//UL2054/CB/KC/PSE/CE/ROHS/UN38.3/MSDS
Brand Name VATS Battery or Neutral
Place of Origin Guangdong, China

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  1. Product Details
  2. Company Details

Product Specification

Supply Ability Ships in 7 Business Days (In-Stock) / 30 Business Days (Out-of-Stock) Max Charge Voltage 4.2V
Battery Size 4.0±0.2 * 20±0.5 * 40±2.5 mm Delivery Time 7 work days
Payment Terms T/T Discharge Rate 0.5C
Cycle Life 500 charge cycles Voltage 3.7V
Capacity 300mAh Packaging Details Industrial cartons compliant with air & sea shipping standards
Model Number 402040 Certification UL1642//UL2054/CB/KC/PSE/CE/ROHS/UN38.3/MSDS
Brand Name VATS Battery or Neutral Place of Origin Guangdong, China
High Light 402040 Li-Polymer rechargeable battery300mAh 3.7V battery cellreliable lithium polymer battery
402040 300mAh 3.7V Reliable Li‑Polymer Rechargeable Battery Cell
Product Specifications
Item Details
Model 402040
Battery Type Lithium polymer battery
Dimension 4.0±0.2 * 20±0.5 * 40±2.5 mm (Thickness*Width*Length)
Nominal Capacity 300mAh, custom size / capacity / voltage available
Nominal Voltage 3.7V
Max Cut‑off Voltage 4.35V
Standard Discharge Current 0.2C‑0.5C
Max Discharge Current 1C
Cycle Life 500 charge‑discharge cycles
Connector JST / Molex, customizable
Certification KC certified
Product Overview

This KC‑certified li polymer battery delivers steady 3.7V power for compact small electronics. As a practical lithium ion battery cell, it fits wearable and portable gadgets, preventing sudden power loss during daily use. Custom options and sample testing are supported for your project needs.

Key Features
  • Stable Power Output for Compact Gadgets: Built as a 3.7V wearable device battery, it maintains consistent discharge performance under standard load, ensuring your portable devices run smoothly without unexpected shutdown.
  • Reliable Long Cycle Performance: Up to 500 working cycles for repeated charge and discharge, providing extended service life and lower long‑term replacement cost for your finished products.
  • Flexible Custom Connector & Parameters: Select JST or Molex connector to match your hardware. Custom size, capacity and voltage are acceptable with no extra modification work needed on your end‑product.
  • Strict KC Safety Certification: This lithium ion battery cell passes KC certification, meeting basic safety requirements for importing electronic goods into Korea and many other regions.
  • Factory Direct Supply & Sample Support: As original manufacturers, we provide sample testing before bulk orders, allowing you to verify real performance before placing mass production orders.
  • Practical Lead Time Arrangement: Stock items ship within 3‑7 days; custom production finishes in 2‑3 weeks, helping you arrange inventory and project schedules efficiently.
Product Applications

This versatile 3.7V wearable device battery fits a wide range of portable consumer electronics for home, commute, travel and outdoor camping scenarios.

Car recorders
GPS navigators
Smart home appliances
Massagers
Digital cameras
Sprayers
Dental rinsers
Smart bracelets
Blackhead remover devices
Remote controls
Smart watches
Electronic toy guns
Electric air pumps
Smart trash cans
Bluetooth speakers
Fingerprint locks
Electric hair clippers
Dog training collars
Pest repellers
Camping lamps
Robot vacuum cleaners
Electric toothbrushes
Pet water fountains
Electric shavers
Mini handheld fans
Other compact smart products
Frequently Asked Questions
Can this li polymer battery work for my custom wearable project?
Yes. It acts as a 3.7V wearable device battery for most compact wearables. Send your device dimension and power requirement, we check compatibility for you. Custom capacity and size are also supported.
What is the typical cycle life of this lithium ion battery cell?
It reaches up to 500 standard charge‑discharge cycles under proper charging condition. Real service life varies with actual discharge load.
Do you support sample testing before bulk purchase?
Samples are available. You can test performance, dimension and connector fitting for your device before placing large orders.
What is your production and shipping lead‑time?
In‑stock items take 3‑7 working days. Custom orders require 2‑3 weeks for production. All packages follow international air & sea shipping standards.
Can I change the connector type on this li polymer battery?
JST and Molex connectors are optional. Notify your connector requirement when you place order.
Does this cell carry KC certification?
Yes, this model holds KC certification, suitable for goods selling into South Korea market.
Is custom capacity or dimension acceptable?
Yes, we support customized size, capacity and voltage according to your project specification.
What is your after‑sales support for bulk orders?
We provide professional technical guidance. Contact our support team once you meet product‑related issues after receiving goods.
After‑Sales Guarantee
  • Sample verification is encouraged to confirm fit for your devices before mass procurement
  • All goods are packed with industrial cartons complying with international air and sea transport rules
  • Our support team offers fast reply for product parameter and application consultation
  • For quality‑related defects from production, valid after‑sales solution will be arranged under proper usage condition
  • Custom projects get dedicated follow‑up during the whole production cycle

Company Details

Bronze Gleitlager

,

Bronze Sleeve Bushings

 and 

Graphite Plugged Bushings

 from Quality China Factory
  • Business Type:

    Manufacturer

  • Year Established:

    2011

  • Total Annual:

    70,000,000-90,000,000

  • Employee Number:

    68~172

  • Ecer Certification:

    Verified Supplier

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Get in touch with us

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  • Shenzhen Vats Power Source Limited
  • 1A 702, Huaqiang Creative Industrial Park, Biyan Street, Guangming District, Shenzhen, Guangdong Province,China
  • https://www.battery-vats.com/

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