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Revive Your Device: Premium Replacement Part
Restore dependable power and performance with this iPhone 12 Pro Max Battery Replacement. Over time, batteries naturally wear out, causing rapid battery drain, unexpected shutdowns, reduced battery health warnings, overheating, or inconsistent charging behavior. Replacing the battery restores proper power delivery, improves device reliability, and ensures your phone lasts throughout the day without frequent charging interruptions.
Technical Specifications
- Part Type: Replacement Battery
- Compatibility: iPhone 12 Pro Max
- Quality Options: AmpSentrix Core / Basic / Plus / Pro / Extended Versions
- Condition: Brand New
- Cycle Count: Zero Cycle (New Cells)
Understanding Your Battery Options
As lithium-ion batteries age, their ability to hold and deliver consistent power declines. This can lead to unreliable performance, shorter usage time, and system slowdowns designed to prevent unexpected shutdowns. Installing a new, high-quality replacement battery restores stable voltage delivery and dependable daily performance.
AmpSentrix Core batteries provide reliable replacement performance and are designed to restore standard functionality. AmpSentrix Basic and Plus batteries offer improved durability, safety protection, and longer service life compared to standard replacements.
Extended versions provide higher capacity, allowing longer usage time between charges. AmpSentrix Pro batteries represent the highest quality tier, featuring premium-grade cells, maximum capacity retention, and performance closest to original factory battery standards.
Strictli Repair Guarantee
Replacing your battery should restore reliable daily performance and power stability. Every battery is tested to ensure proper charging, safe operation, and full compatibility before shipping.
- Restores Battery Life: Eliminates fast drain and frequent charging.
- Reliable Charging Performance: Fixes shutdown issues and unstable power delivery.
- Zero Cycle Cells: Ensures maximum capacity and long service life.
- Strictli Warranty: Backed by Strictli for peace of mind. See Terms and Conditions for details.
What are my iPhone Battery Replacement Options?
iPhone Battery Replacement Options
Is your iPhone not holding a charge like it used to? We use premium Ampsentrix batteries—the industry's leading standard for safe, reliable power. All of our batteries are brand new, zero-cycle, and fully certified.
Premium / Pro (OEM-Grade Capacity)
Our top-tier standard replacement battery. It is built to match the exact specifications and capacity of the original battery that came with your iPhone.
- Factory Matched Performance: Provides the exact same mAh capacity as a brand-new original Apple battery.
- Smart Chip Technology: Built with premium internal gauges to ensure accurate battery percentages, stable charging, and built-in protection.
- Maximum Lifespan: Made with high-grade lithium-ion cells designed to last for years of daily charging cycles.
High-Capacity / Extended
A premium battery engineered to pack a higher energy density into the same physical space, giving you more battery life than the phone originally had.
- More Power Than Original: Features a significantly higher mAh rating, meaning more hours of screen-on time.
- Fewer Charges Needed: Easily gets heavy users through the entire day without needing to reach for a charger.
- Safe & Certified: Meets all international safety and performance standards despite the increased power output.
Basic / Standard
A high-quality, entry-level aftermarket battery. It gets the job done safely without the premium price tag.
- Cost-Effective: The most affordable way to restore reliable daily power to your device.
- Safe & Reliable: Rigorously tested to ensure stable charging and discharging.
- Standard Lifespan: Provides solid, everyday performance to keep your phone running smoothly.
A Quick Note on Apple's Battery Health Feature:
For iPhone XS and newer models: Because Apple locks original batteries to the phone's motherboard, replacing the battery will result in an "Important Battery Message" or "Unknown Part" notification in your settings, and the "Battery Health %" feature will no longer display. This is completely normal. It does not affect the performance, charging speed, or lifespan of your new premium battery in any way. You will still get 100% full performance out of your new battery.
Tools We Strongly Recommend!
Pro-Grade Repair Recommendations
Essential gear curated by our specialists to ensure your device is handled with precision and safety.
Essential: 16-in-1 Precision Toolkit

The "Do-It-All" Specialist. Skips the overwhelming bit sets and gives you exactly what you need for modern mobile repair: eight dedicated precision screwdrivers and a full suite of spudgers.
View Toolkit DetailsPrecision: Double-Ended Metal Pry Tool

For the toughest seals. Forged from premium stainless steel to slice through factory adhesive and pop open complex shells where plastic fails.
View Pry Tool DetailsSafety: Anti-Static Plastic Pry Bar (Spudger)

The safest way to lift batteries. Forged from non-conductive polymer, this tool allows you to pry up glued batteries and disconnect power cables without the risk of dangerous punctures or electrical shorts.
- Non-metallic edge prevents lithium-ion battery damage.
- Anti-static material protects sensitive motherboard connectors.
Safe Grip: High-Strength Suction Cup

Pull screens safely and easily. A professional-grade tool for lifting tightly sealed glass panels. Takes the stress out of cracking open your devices.
View Suction Cup DetailsStrictli Quality & Fast Shipping:
All toolkits are sourced from professional-grade suppliers and ship fast directly from the USA. Functionality is assured.
What is the Strictli Warranty?
By completing a purchase at Strictli, you (the "Buyer") agree to the following legally binding terms. Our policies are designed to protect our inventory integrity and ensure the lowest possible prices for our customers.
1. Absolute Final Sale Policy
All sales are final. Once an order has been handed to the shipping carrier, it cannot be returned, refunded, or exchanged for any reason other than a verified manufacturing error.
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Misdiagnosis: Strictli is not responsible for incorrect diagnosis. If our part does not fix your device, it is not considered defective.
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Compatibility: It is the Buyer's responsibility to verify part numbers and model versions before purchase.
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Software/Feature Locks: Modern manufacturers (e.g., Apple) may display "Genuine Part" warnings or disable features (FaceID, TrueTone) after a repair. These are software restrictions by the manufacturer and do not constitute a defective part. No refunds will be issued for software-pairing limitations.
2. Order Cancellations & Fees
Our fulfillment process begins immediately upon order placement.
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Cancellation Fee: Any order cancelled before a shipping label is created will incur a 5% cancellation fee to cover non-refundable merchant processing costs.
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In-Flight Orders: Once a shipping label is generated, the order cannot be cancelled.
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Urgency: To attempt a cancellation, you must call 614-944-8073 immediately. We cannot guarantee email requests will be processed before shipping.
3. Technical Support & Installation Disclaimer
Strictli is a parts distributor, not a repair service.
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Technical Support: We provide "how-to" instructions directly from the manufacturer's website as a courtesy. We do not provide live technical guidance.
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Professional Installation Recommended: We strongly recommend repairs be performed by certified technicians.
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Assumption of Risk: The Buyer assumes all risk of property damage (including the device being repaired), data loss, or personal injury. Strictli is not liable for any damage caused by DIY repair attempts.
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Battery Safety: Lithium-ion batteries are volatile. Puncturing, bending, or improper handling can cause fire or explosion. Use extreme caution.
4. 90-Day Limited Manufacturing Warranty
We guarantee our parts are free from manufacturing defects for 90 days from the date of delivery.
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The "Dry Test" Requirement: Buyers must "Dry Test" parts (connect cables without removing adhesives or mounting) before full installation. Once protective films/adhesives are removed or the part is fully seated, the warranty is limited.
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Anti-Fraud Protections: Strictli utilizes invisible UV marking, QR codes, and serialized tracking on all components. Any attempt to return a part not sold by Strictli is considered fraud and will be reported to authorities.
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Voided Warranty: Evidence of installation damage (torn flex cables, cracked connectors, pressure spots), ESD damage, or tampered security marks will immediately void the warranty.
5. Shipping, Risk of Loss, & Transit Damage
Strictli ensures all parts are inspected and securely packaged prior to shipment.
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Risk of Loss: Once a package is scanned as "Delivered" by the carrier, the risk of loss or theft passes entirely to the Buyer. Strictli is not responsible for "Porch Piracy" or packages stolen after successful delivery.
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24-Hour Damage Window: Any part that arrives physically damaged or non-functional must be reported to support@strictli.tech within 24 hours of delivery.
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Evidence Required: You must provide clear photos of:
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The exterior shipping box (showing the label and any damage).
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The internal packaging materials.
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The damage to the part and the Strictli UV/Security mark.
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Undeliverable Packages: Strictli is not responsible for incorrect addresses. If a package is returned, the Buyer must pay a new shipping fee to have it re-sent. No refunds are issued for refused or undeliverable mail.
6. Warranty Claim & RMA Process
To exercise the 90-Day Limited Manufacturing Warranty, this process must be followed:
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RMA Authorization: No returns will be accepted without a Return Merchandise Authorization (RMA) number. Email support@strictli.tech to begin a claim.
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Return Shipping: The Buyer is responsible for all shipping costs and insurance associated with returning the part to Strictli for inspection.
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Resolution: If the part is found to have a genuine manufacturing defect, Strictli will, at its discretion, provide a replacement part or store credit. No cash or credit card refunds will be issued for warranty claims.
7. Assumption of Risk & Limitation of Liability
By purchasing tools, replacement parts, or repair kits from Strictli, you acknowledge and agree that electronic device repair carries inherent risks. These risks include, but are not limited to, damage to your device, irreversible data loss, and personal injury (such as cuts from shattered glass or burns from punctured lithium-ion batteries).
Strictli provides these tools and parts "as is" and acts strictly as a retailer of these goods. We are not responsible for any damage to your personal property, loss of data, or personal injury that occurs before, during, or after the repair process.
The buyer assumes 100% of the risk and liability associated with the use, misuse, or inability to use our products. We highly recommend that all repairs be performed in a safe environment, using proper safety equipment (such as safety glasses and anti-static tools), and following official manufacturer or professional repair guidelines.
How Fast Will my order ship?
Strictli Shipping Promise
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Same-Day Shipping: If you place your order before 1 PM EST, it will ship the same day!
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Next-Day Shipping: Orders placed after 1 PM EST will ship the next business day.
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Fast Delivery: All Strictli shipments are sent via UPS, so you’ll receive your item within 5 days!
I Can't Find What I am Looking For!
Looking for something else?
We understand that tech can sometimes be hard to find or simply confusing — and that’s where we’re Strictli Different. If you have questions about a device or can’t find what you’re looking for on our site, we encourage you to reach out to us at support@strictli.tech or give us a call Monday through Friday at 614.944.8073.
We help customers every day place custom orders for devices not listed online — it’s just one of the ways we make sure you get exactly what you’re looking for.
