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iPhone 14 Diagnostic Battery Replacement 3279mAh Li-ion Battery Supplier

Factory direct iPhone 14 diagnostic battery replacement with 3279mAh capacity, reliable lithium-ion cells, OEM customization, stable supply, quality control, and bulk support for repair shops and distributors.

iPhone 14 Diagnostic Battery Replacement 3279mAh Li-ion Battery Supplier






Why Choose our iPhone 14 Diagnostic Battery?

We are a professional lithium battery manufacturer providing factory-direct supply, OEM/ODM customization, stable quality control, and bulk battery solutions for global repair businesses, distributors, and electronic service providers.

Factory Direct Battery Supply

Factory-direct manufacturing ensures competitive wholesale pricing, stable production capacity, and reliable long-term supply for global repair businesses.

OEM & Custom Battery Solutions

Support OEM logo printing, customized packaging, private-label branding, barcode labels, and tailored battery solutions for distributors and brands.

Reliable Quality Control

Every battery undergoes capacity testing, voltage verification, charging and discharging tests, safety inspection, and final quality control before shipment.

Professional Repair Market Support

Designed specifically for smartphone repair shops, refurbishment companies, wholesalers, distributors, and aftermarket service providers.

Global Shipping Capability

Professional export packaging and worldwide logistics support with the required battery transportation documents for international markets.


Quick Specifications

Item Specification
Battery Type Lithium-ion Polymer Battery
Compatible Model iPhone 14
Capacity 3279mAh
Nominal Voltage 3.87V
Energy 12.69Wh
Battery Model iPhone 14 Diagnostic Battery
Battery Application Smartphone Replacement Battery
Quality Control Capacity Test / Charging Test / Safety Inspection
Certification CE, RoHS, UN38.3 (Available)
MOQ Negotiable
Lead Time 7–15 Working Days (Depending on Quantity)
Warranty 12 Months
Shipping Method Air Freight / Express / Sea Shipping

iPhone 14 battery replacement

What Is the iPhone 14 Diagnostic Battery?

The iPhone 14 Diagnostic Battery is a high-quality lithium-ion replacement battery designed for smartphone repair professionals and refurbishment businesses. It provides stable power performance with a 3279mAh capacity and a nominal voltage of 3.87V. Manufactured under strict quality control, this replacement battery supports OEM supply, wholesale purchasing, and customized battery solutions for global repair channels.


Key Features

1. Diagnostic Battery Compatibility

Designed specifically for iPhone 14 repair and replacement applications with excellent compatibility.

2. Stable Lithium Battery Performance

High-quality lithium-polymer cells provide reliable capacity, stable voltage output, and consistent charging and discharging performance.

3. Professional Repair Solution

Ideal for smartphone repair shops, refurbishment companies, mobile device service providers, and electronics distributors.

4. OEM & Bulk Supply Support

Supports wholesale purchasing, OEM branding, private-label packaging, and customized battery solutions for B2B customers.

5. Strict Quality Inspection

Every battery is tested for voltage, capacity, charging performance, safety, and overall functionality before shipment.


Compatible Models

Device Model Battery Type Capacity
iPhone 14 Diagnostic Lithium Battery 3279mAh

Applications

Smartphone Repair & Replacement Market

This iPhone 14 diagnostic battery is widely used for:

  • Mobile phone repair shops

  • Smartphone refurbishment businesses

  • Electronics distributors

  • Replacement battery wholesalers

  • OEM/private-label battery brands

  • Aftermarket repair service providers


iPhone 14 Original Battery vs Replacement Battery Comparison

Comparison Original Battery AOVOLT Replacement Battery
Battery Type Lithium-ion Polymer Lithium-ion Polymer
Application iPhone 14 Factory Battery iPhone 14 Repair Replacement
Capacity 3279mAh 3279mAh
Voltage 3.87V 3.87V
Supply Channel Device Manufacturer Factory Direct Supplier
MOQ Limited Availability Flexible Wholesale MOQ
Customization Not Available OEM Label & Packaging Support
Quality Control Factory Standard Capacity & Safety Testing
Business Usage Individual Replacement Repair Shops & Distributors

FAQ

1. What battery model is compatible with this replacement battery?

This diagnostic battery is designed specifically for iPhone 14 replacement applications.

2. What is the capacity of the iPhone 14 replacement battery?

The battery has a capacity of 3279mAh, a nominal voltage of 3.87V, and an energy rating of 12.69Wh.

3. Is this battery suitable for repair shops?

Yes. It is designed for professional repair shops, refurbishment companies, smartphone service providers, and electronics distributors.

4. Do you provide wholesale battery supply?

Yes. We support bulk orders for distributors, repair channels, wholesalers, and other B2B customers worldwide.

5. Can you provide OEM branding?

Yes. We provide OEM/ODM services including custom logos, labels, packaging, private-label branding, and customized battery solutions.

6. How do you ensure battery quality?

Each battery undergoes capacity testing, voltage testing, charging and discharging verification, safety inspection, appearance inspection, and final quality control before shipment.

7. What certifications are available for the battery?

Available certifications include CE, RoHS, and UN38.3, with additional documentation provided according to customer and destination market requirements.

8. What is the minimum order quantity?

MOQ is flexible and can be negotiated based on order quantity, customization requirements, and project needs.

9. How long is the delivery time?

The standard production lead time is 7–15 working days, depending on order quantity and customization requirements.

10. Do you ship internationally?

Yes. We provide worldwide shipping through express delivery, air freight, and sea freight, supported by professional export packaging and international logistics services.

Our Factory

Since 2016, ESC has served B2B buyers with replacement batteries and charging products. We offer 3,000+ models for iPhone, Android phones, tablets and laptops, with flexible MOQs, lead times within seven days and a customer-reported defect rate below 1%. Since 2022, we have developed private-mold fast-charging power banks with broad protocol compatibility and thermal control. ESC supports brands, wholesalers, refurbishers and repair chains with OEM/ODM, certification and production services.

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Our Certificates

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OEM & ODM Battery Order Process

  1. 01

    Customer Inquiry & Requirement Confirmation

    Confirm battery models, capacity, quantity, target market, certification and customization requirements.

  2. 02

    Quotation

    Provide a detailed quotation based on product specifications, order quantity, packaging and delivery requirements.

  3. 03

    Customization Details Confirmation

    Confirm customized labels, barcodes, silk-screen artwork, logo printing, packaging and other branding details.

  4. 04

    Order Confirmation

    Finalize product specifications, quantities, unit prices, payment terms, delivery schedule and shipping method.

  5. 05

    Deposit Payment

    The customer pays the agreed deposit so that materials and production can be arranged.

  6. 06

    Production Arrangement

    Arrange material preparation, battery assembly, quality inspection, aging tests, packaging and order completion.

  7. 07

    Balance Payment

    The customer pays the remaining balance after production is completed and the order details are confirmed.

  8. 08

    Shipment

    Arrange shipment by an approved air, sea, railway or express channel according to the destination and order requirements.

  9. 09

    Delivery & Receipt Follow-Up

    Provide shipping documents and tracking information, and follow up until the customer receives the goods.

  10. 10

    24/7 After-Sales Support

    Provide responsive technical assistance, quality-issue analysis and after-sales solutions after delivery.

How to Choose a Reliable Replacement Battery Supplier

Evaluate cell quality, testing capability, assembly details, production consistency and installation support before purchasing smartphone, tablet or laptop replacement batteries.

Verify Battery Model Coverage and Compatibility

Choose a supplier with broad coverage for smartphone, tablet and laptop batteries. Confirm the original battery code, device model, connector position, dimensions, rated voltage and system compatibility before ordering.

A supplier with an established model database can reduce incorrect shipments, installation problems and compatibility-related returns.

1

Check the Quality of Cells and Electronic Components

Battery quality starts with the raw materials. Ask the supplier about:

  • Battery-cell manufacturer and grade
  • Actual cell capacity
  • Cell cycle life
  • PCB and protection-chip solution
  • Connector and flex-cable quality
  • Traceability of key components

Reliable suppliers should use graded cells rather than selecting components only by the lowest price.

2

Review Incoming Material Inspection and Cell Grading

Cells should be tested and grouped according to:

  • Capacity
  • Voltage
  • Internal resistance
  • Self-discharge
  • Thickness and dimensions
  • Appearance

Proper cell grading improves consistency between batteries from the same production batch and reduces abnormal runtime, swelling and early failure.

3

Require Complete Electrical and Compatibility Testing

A professional supplier should test more than the open-circuit voltage. Quality verification should include:

  • Charging and discharging performance
  • Actual capacity
  • Battery current
  • Protection functions
  • Cycle count and battery data
  • Fuel-gauge parameters
  • Device compatibility
  • Temperature performance

Professional battery testers can perform charging, discharging, current calibration and precise parameter comparison, helping identify batteries whose measured data does not match the approved specification.

4

Evaluate Automation and Production Consistency

Automated production processes normally provide better consistency and higher capacity than heavily manual assembly.

Important processes may include:

  • Automatic cell sorting
  • Automatic welding
  • Automatic PCB testing
  • Automatic adhesive application
  • Barcode traceability
  • In-line functional inspection

Automation does not replace quality control, but it helps reduce variation caused by manual positioning, welding and assembly.

5

Inspect Assembly Details

Small assembly details have a major effect on installation efficiency and product reliability.

A well-finished battery should include:

  • Pre-applied battery adhesive
  • Dust-proof protective film
  • Protective sleeve around the flex cable
  • Fixed flex-cable position
  • Stable connector orientation
  • No loose or moving battery cable
  • Clean edges and accurate dimensions

These details reduce flex-cable damage, dust contamination, installation movement and incorrect connector alignment.

6

Confirm In-Process and Final Quality Inspection

The supplier should conduct inspection throughout production rather than checking only finished goods.

Recommended checkpoints include:

  • Incoming material inspection
  • Cell grading
  • PCB and BMS testing
  • Welding inspection
  • Assembly inspection
  • Capacity testing
  • Aging testing
  • Appearance inspection
  • Packaging inspection
  • Final random inspection

Ask whether inspection data can be traced back to the production batch.

7

Compare Capacity Claims, Defect Rate and Certification

Do not select batteries based only on the highest printed capacity.

A credible supplier should provide:

  • Tested capacity data
  • Clear rated voltage and energy
  • Customer-reported defect rate
  • Warranty policy
  • CE, RoHS, FCC, MSDS and UN38.3 documentation where applicable
  • Model-specific certification support

Exaggerated capacity labels without matching cell space, weight and test data are a significant purchasing risk.

8

Follow Correct Battery Installation Procedures

Even a qualified battery can fail if it is installed incorrectly.

Before installation:

  • Discharge the original battery below 25%
  • Power off the device
  • Use non-metallic opening tools
  • Disconnect the battery before handling other internal components
  • Avoid puncturing, bending or crushing the cell
  • Remove the protective film from the adhesive correctly
  • Align the battery and connector before pressing it into place
  • Confirm that the flex cable is not folded, stretched or trapped
  • Reinstall screws and brackets in their original positions
  • Test charging, battery recognition and device functions before final sealing

The installation guide specifically warns that a charged lithium-ion battery may catch fire or explode if punctured, and instructs technicians to power off the phone before disassembly.

9

Contact Us

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Minimum Order: 10 Units
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