Home/Products/Original Capacity iPhone Replacement Batteries/iPhone 11 Pro Max Replacement Battery

ESC iPhone 11 Pro Max replacement battery is a factory direct Li-ion polymer battery solution with OEM customization, stable quality control, wholesale supply, and global shipping support for repair shops, distributors, and private label brands.

iPhone 11 Pro Max Replacement Battery

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Why Choose iPhone 11 Pro Max Replacement Battery?

Professional OEM Smartphone Battery Manufacturer

ESC is a professional lithium battery manufacturer specializing in smartphone replacement batteries. We provide reliable iPhone 11 Pro Max battery solutions for repair shops, wholesalers, refurbishment companies, distributors, and private label brands worldwide.

Factory Direct Battery Supply

Direct factory supply helps customers obtain competitive wholesale pricing, stable production capacity, flexible MOQ, and consistent battery quality for long-term business cooperation.

Premium Li-ion Polymer Battery Cells

Selected lithium-ion polymer cells provide stable voltage output, reliable cycle performance, and excellent safety performance for professional replacement applications.

Strict Quality Control

Every battery undergoes capacity testing, voltage inspection, charging performance testing, appearance inspection, and safety verification before shipment.

OEM & ODM Customization Service

ESC supports customized packaging, private labels, branding solutions, and bulk battery production for global distributors, repair chains, and mobile accessory companies.

Global Export Capability

Provide worldwide shipping solutions with export support documents including CE, MSDS, and UN38.3 certification according to customer requirements.

Quick Specifications

Item	Specification
Compatible Model	iPhone 11 Pro Max
Battery Type	Li-ion Polymer Battery
Capacity	3969mAh
Nominal Voltage	3.79V
Energy	15.04Wh
Battery Condition	Brand New Replacement Battery
Cell Type	Lithium-ion Polymer Cell
Quality Control	Capacity Test / Voltage Test / Safety Inspection
Defect Rate	≤1%
Warranty	12 Months
Certification	CE / MSDS / UN38.3
MOQ	Negotiable
Lead Time	7-15 Working Days
Shipping Method	Express / Air Freight / Sea Freight

What Is iPhone 11 Pro Max Replacement Battery?

The iPhone 11 Pro Max Replacement Battery is a high-quality Li-ion polymer battery designed for professional smartphone repair and replacement applications. With a 3969mAh capacity and stable power output, it provides a reliable replacement solution for aging or damaged iPhone 11 Pro Max batteries. ESC offers factory direct battery supply, OEM customization, strict quality control, and wholesale battery solutions for repair businesses, distributors, and private label customers.

Key Features

1. Stable 3969mAh Battery Performance

Designed according to iPhone 11 Pro Max battery specifications, providing reliable power output and stable daily performance.

2. Premium Lithium-ion Polymer Cells

Uses high-quality Li-ion polymer cells with stable voltage output, low internal resistance, and reliable cycle life.

3. Professional Replacement Solution

Ideal for smartphone repair shops, refurbishment companies, technicians, and aftermarket battery suppliers.

4. Factory Quality Testing

Each battery is tested for capacity, voltage, charging performance, appearance, and safety before shipment.

5. OEM Wholesale Supply

Supports bulk orders, customized packaging, private labeling, and long-term battery supply cooperation.

Compatible Models

Device Model	Battery Model	Compatibility
iPhone 11 Pro Max	A2218	Compatible
iPhone 11 Pro Max	A2161	Compatible
iPhone 11 Pro Max	A2220	Compatible

Applications

Smartphone Repair & Replacement Market

The iPhone 11 Pro Max replacement battery is designed for professional repair technicians, mobile phone repair shops, refurbishment companies, and service providers requiring reliable battery replacement solutions.

Wholesale Battery Distribution

Suitable for battery wholesalers, electronics distributors, online retailers, and aftermarket spare parts suppliers seeking factory direct smartphone battery supply.

OEM & Private Label Business

ESC provides OEM packaging, private branding, customized solutions, and bulk production services for mobile accessory brands and battery distributors.

Original Battery vs ESC Replacement Battery Comparison

Feature	Original Battery	ESC Replacement Battery
Battery Type	Li-ion Polymer Battery	Li-ion Polymer Battery
Compatible Model	iPhone 11 Pro Max	iPhone 11 Pro Max
Capacity	3969mAh	3969mAh
Voltage	3.79V	3.79V
Application	Factory Installed Device	Professional Repair Replacement
Supply Source	Original Device Supply Chain	Factory Direct Manufacturer
Wholesale Availability	Limited	Available
OEM Packaging	Not Supported	Supported
Private Label	Not Available	Supported
Quality Testing	Manufacturer Standard	100% Functional Testing
Warranty	Limited Manufacturer Policy	12 Months
Custom Solution	Limited	OEM/ODM Available

FAQ

1. Is this iPhone 11 Pro Max replacement battery compatible with the original device?

Yes. This replacement battery is designed specifically for iPhone 11 Pro Max repair applications and matches the original battery size and specifications.

2. What is the capacity of the iPhone 11 Pro Max replacement battery?

The battery capacity is 3969mAh with a nominal voltage of 3.79V and energy of 15.04Wh.

3. Is this an original Apple battery?

No. This is a high-quality aftermarket replacement battery manufactured for professional repair, refurbishment, and wholesale markets.

4. What type of battery cells are used?

The battery uses premium lithium-ion polymer cells to provide stable performance, safety, and reliable cycle life.

5. Is this battery suitable for smartphone repair shops?

Yes. It is designed for repair shops, refurbishment companies, technicians, distributors, and aftermarket battery suppliers.

6. Do you provide OEM packaging and private label services?

Yes. ESC supports OEM packaging, customized labels, private branding, and bulk battery solutions for global customers.

7. How do you ensure battery quality before shipment?

Each battery undergoes capacity testing, voltage testing, charging inspection, appearance inspection, and safety verification before delivery.

8. What certifications are available for this battery?

CE, MSDS, and UN38.3 certification documents are available according to customer requirements.

9. What is the warranty period for this replacement battery?

ESC provides a 12-month warranty covering manufacturing defects and quality-related issues.

10. Do you support worldwide shipping for wholesale orders?

Yes. ESC provides global shipping solutions through express delivery, air freight, and sea freight for international customers.

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.

Our Certificates

OEM & ODM Battery Order Process

01
Customer Inquiry & Requirement Confirmation
Confirm battery models, capacity, quantity, target market, certification and customization requirements.
02
Quotation
Provide a detailed quotation based on product specifications, order quantity, packaging and delivery requirements.
03
Customization Details Confirmation
Confirm customized labels, barcodes, silk-screen artwork, logo printing, packaging and other branding details.
04
Order Confirmation
Finalize product specifications, quantities, unit prices, payment terms, delivery schedule and shipping method.
05
Deposit Payment
The customer pays the agreed deposit so that materials and production can be arranged.
06
Production Arrangement
Arrange material preparation, battery assembly, quality inspection, aging tests, packaging and order completion.
07
Balance Payment
The customer pays the remaining balance after production is completed and the order details are confirmed.
08
Shipment
Arrange shipment by an approved air, sea, railway or express channel according to the destination and order requirements.
09
Delivery & Receipt Follow-Up
Provide shipping documents and tracking information, and follow up until the customer receives the goods.
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.

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.

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.

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.

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.

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.

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.

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.

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.

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