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iP9 Battery FAQs – Choose the Right Replacement

We offer three iP9 aftermarket battery options for iPhone: Standard Capacity, High Capacity, and Calibration. This guide explains the differences so you can pick what suits you best.

Quick Comparison

Battery TypeCapacityBattery Health DisplayBest ForCompatibilityNotes
Standard CapacityMatches original (like-for-like mAh)Shows as new after install (health may stabilise after a few charge cycles)Everyday users wanting original-style runtime & feelMost supported iPhone modelsClosest experience to the factory battery
High CapacityHigher than original (longer runtime per charge)Shows as new; health % may fluctuate initiallyHeavy users, travellers, field work, gaming, and content creatorsMost supported iPhone modelsMay take slightly longer to fully charge
CalibrationMatches originalDesigned to calibrate via Apple diagnostics; shows as “used” in parts history by designShops/technicians and users who want diagnostics to reflect a replaced/calibrated packiPhone 12 → iPhone 15 Pro Max onlyHelps align Battery Health reporting with iOS after service
What is a Standard Capacity iP9 battery?

Our Standard Capacity option is a like-for-like replacement that aims to match the original battery’s nominal capacity and everyday performance. It’s the easiest choice if you want your iPhone to feel the same as it did when the original battery was fresh.

  • Balanced runtime, charge time, and thermal behaviour similar to stock.
  • Battery Health in iOS may take a few full charge cycles to stabilise after install.
  • Great default choice for most users and business deployments.
What is a High Capacity iP9 battery?

High Capacity batteries are engineered with a higher nominal capacity than stock, giving you noticeably longer runtime between charges. Perfect if you’re on-the-go all day or you use battery-intensive apps.

  • Longer runtime: more hours per charge compared to original-spec packs.
  • Trade-offs: may take a little longer to reach 100% and can weigh a touch more.
  • Battery Health %: can fluctuate in the first few cycles—this is normal as iOS learns the new pack.
  • Best for power users, travel, remote work, and gaming/streaming.

Tip: For fastest top-ups, keep the phone cooler while charging and avoid covering it or using high-drain apps during the charge.

What is a Calibration iP9 battery and why does it show as “used”?

The Calibration battery is designed specifically to work with Apple diagnostic workflows so the system can calibrate the pack and record the service in parts history. After calibration, iOS may display the part as used/repaired by design—this helps align Battery Health reporting and service records.

  • Compatibility: available for iPhone 12 through iPhone 15 Pro Max only.
  • Use case: ideal for service centres/technicians or customers who want diagnostic tools to reflect the replacement.
  • Capacity targets match original; focus is on calibration & reporting accuracy rather than extended runtime.

Note: Showing as “used” in parts history is expected behaviour for this battery type and doesn’t indicate poor quality.

Which battery should I choose?
  • Everyday / Business Use

    Choose Standard Capacity for stock-like performance, charge time, and longevity.

  • Heavy / All-day Use

    Choose High Capacity for longer runtime between charges (travel, field work, gaming, content creation).

  • Diagnostics & Service Records

    Choose Calibration (iPhone 12–15 Pro Max) to align Battery Health reporting with Apple diagnostics and record service history.

How long do these batteries last?

Battery lifespan depends on charge cycles, temperature, charge habits, and workload. In typical use, you should expect strong performance for hundreds of cycles. Avoid frequent deep discharges, extreme heat, and constant 100%-to-0% cycling to maximise longevity.

Will Battery Health (%) change after replacement?

After any replacement, iOS may take several full charge cycles to learn the new pack and stabilise the reported Battery Health %. Calibration batteries are designed to assist diagnostic workflows and parts history recording, which can help Battery Health reporting align more predictably over time.

Any installation or safety tips?
iP9 iPhone Battery Replacements

iP9 iPhone Battery Replacements

Click a battery type or choose your model below. If you need help with choosing the right battery,   click here for more.

For iPhone 12 Pro Max - Battery Replacement - 3687 mAh - iP9 - Diagnostic Calibration Battery
Calibration
Compatible with: iPh 12PM SKU: 9506462371678
This replacement battery for the iPhone 12 Pro Max provides an economical alternative to purchasing a fully new battery, helping to restore your phone's battery performance and battery health indicator.This battery utilizes an original Apple Battery Management System (BMS) sourced from genuine recyc..
£41.95
Ex Tax:£34.96
For iPhone 13 Pro - Battery Replacement - 3095 mAh - iP9 - Diagnostic Calibration Battery
Calibration
Compatible with: iPh 13P SKU: 9509479318827
This replacement battery for the iPhone 13 Pro provides an economical alternative to purchasing a fully new battery, helping to restore your phone's battery performance and battery health indicator.This battery utilizes an original Apple Battery Management System (BMS) sourced from genuine recycled ..
£35.95
Ex Tax:£29.96
For iPhone 14 Pro - Battery Replacement - 3200 mAh - iP9 - Diagnostic Calibration Battery
Calibration
Compatible with: iPh 14P SKU: 9509698944432
This replacement battery for the iPhone 14 Pro provides an economical alternative to purchasing a fully new battery, helping to restore your phone's battery performance and battery health indicator.This battery utilizes an original Apple Battery Management System (BMS) sourced from genuine recycled ..
£35.95
Ex Tax:£29.96
For iPhone 15 Plus - Battery - 4383 mAh - iP9 - Diagnostic Calibration Battery
Calibration
Compatible with: iPh 15+ SKU: 9508743589451
This replacement battery for the iPhone 15 Plus provides an economical alternative to purchasing a new battery, helping to restore your phone's battery performance and battery health indicator.This battery utilises an original Apple Battery Management System (BMS) sourced from genuine recycled batte..
£41.95
Ex Tax:£34.96
For iPhone 12 - 12 Pro - Battery Replacement - 2815 mAh - iP9 - Diagnostic Calibration Battery
Calibration
Compatible with: iPh 12/12P SKU: 9509967127191
This replacement battery for the iPhone 12 - 12 Pro provides an economical alternative to purchasing a fully new battery, helping to restore your phone's battery performance and battery health indicator.This battery utilizes an original Apple Battery Management System (BMS) sourced from genuine recy..
£29.95
Ex Tax:£24.96
For iPhone 12 Pro Max - Battery Replacement - 4350 mAh - iP9 - High Capacity
High Capacity
Compatible with: iPh 12PM SKU: 9504755652756
iP9 High Capacity replacement batteries for the Apple iPhone 12 Pro Max have been thoroughly tested and meet or exceed the performance of original Apple batteries. They are fully compatible with the original manufacturer's specifications.Features:4350 mAhOver Current/Discharge ProtectionFast Chargin..
£35.95
Ex Tax:£29.96
For iPhone 13 - Battery Replacement - 3227 mAh - iP9 - Diagnostic Calibration Battery
Calibration Out Of Stock
Compatible with: iPh 13 SKU: 9503984746298
This replacement battery for the iPhone 13 provides an economical alternative to purchasing a fully new battery, helping to restore your phone's battery performance and battery health indicator.This battery utilizes an original Apple Battery Management System (BMS) sourced from genuine recycled batt..
£35.95
Ex Tax:£29.96
For iPhone 13 Mini - Battery Replacement - 2406 mAh - iP9 - Diagnostic Calibration Battery
Calibration
Compatible with: iPh 13M SKU: 9501276931353
This replacement battery for the iPhone 13 Mini provides an economical alternative to purchasing a fully new battery, helping to restore your phone's battery performance and battery health indicator.This battery utilizes an original Apple Battery Management System (BMS) sourced from genuine recycled..
£41.95
Ex Tax:£34.96
For iPhone 13 Pro - Battery Replacement - 3400 mAh - iP9 - High Capacity
High Capacity
Compatible with: iPh 13P SKU: 9501581378799
iP9 High Capacity replacement batteries for the Apple iPhone 13 Pro have been thoroughly tested and meet or exceed the performance of original Apple batteries. They are fully compatible with the original manufacturer's specifications.Features:3400 mAhOver Current/Discharge ProtectionFast Charging Su..
£35.95
Ex Tax:£29.96
For iPhone 13 Pro Max - Battery Replacement - 4352 mAh - Diagnostic Calibration Battery
Calibration Out Of Stock
Compatible with: iPh 13PM SKU: 9501912331189
This replacement battery for the iPhone 13 Pro Max provides an economical alternative to purchasing a fully new battery, helping to restore your phone's battery performance and battery health indicator.This battery utilizes an original Apple Battery Management System (BMS) sourced from genuine recyc..
£35.95
Ex Tax:£29.96
For iPhone 14 - Battery Replacement - 3279 mAh - Diagnostic Calibration Battery
Calibration
Compatible with: iPh 14 SKU: 9507186266639
This replacement battery for the iPhone 14 provides an economical alternative to purchasing a fully new battery, helping to restore your phone's battery performance and battery health indicator.This battery utilizes an original Apple Battery Management System (BMS) sourced from genuine recycled batt..
£35.95
Ex Tax:£29.96
For iPhone 14 Plus - Battery Replacement - 4325 mAh - iP9 - Diagnostic Calibration Battery
Calibration
Compatible with: iPh 14+ SKU: 9507543716876
This replacement battery for the iPhone 14 Plus provides an economical alternative to purchasing a fully new battery, helping to restore your phone's battery performance and battery health indicator.This battery utilizes an original Apple Battery Management System (BMS) sourced from genuine recycled..
£41.95
Ex Tax:£34.96
For iPhone 14 Pro - Battery Replacement - 3400 mAh - iP9 - High Capacity
High Capacity
Compatible with: iPh 14P SKU: 9503654929280
iP9 replacement batteries for the Apple iPhone 14 Pro have been thoroughly tested and meet or exceed the performance of original Apple batteries. They are fully compatible with the original manufacturer's specifications.Features:3400 mAhOver Current/Discharge ProtectionTI MCU ICFast Charging Support..
£41.95
Ex Tax:£34.96
For iPhone 14 Pro Max - Battery Replacement - 4323 mAh - Diagnostic Calibration Battery
Calibration
Compatible with: iPh 14PM SKU: 9503993254623
This replacement battery for the iPhone 14 Pro Max provides an economical alternative to purchasing a fully new battery, helping to restore your phone's battery performance and battery health indicator.This battery utilizes an original Apple Battery Management System (BMS) sourced from genuine recyc..
£35.95
Ex Tax:£29.96
For iPhone 15 Plus - Battery Replacement - 4620 mAh - iP9 - High Capacity
High Capacity
Compatible with: iPh 15+ SKU: 9503513759997
iP9 replacement batteries for the Apple iPhone 15 Plus have been thoroughly tested and meet or exceed the performance of the original Apple batteries. They are fully compatible with the original manufacturer's specifications.Features:4620 mAhOver Current/Discharge ProtectionFast Charging Support12 M..
£35.95
Ex Tax:£29.96
For iPhone 15 Pro - Battery - 3274 mAh - iP9 - Diagnostic Calibration Battery
Calibration
Compatible with: iPh 15P SKU: 9504933871764
This replacement battery for the iPhone 15 Plus provides an economical alternative to purchasing a new battery, helping to restore your phone's battery performance and battery health indicator.This battery utilises an original Apple Battery Management System (BMS) sourced from genuine recycled batte..
£41.95
Ex Tax:£34.96
For iPhone 12 - 12 Pro - Battery Replacement - 3320 mAh - iP9 - High Capacity
High Capacity
Compatible with: iPh 12/12P SKU: 9508671298180
iP9 High Capacity replacement batteries for the Apple iPhone 12 / 12 Pro have been thoroughly tested and meet or exceed the performance of original Apple batteries. They are fully compatible with the original manufacturer's specifications.Features:3320 mAhOver Current/Discharge ProtectionFast Chargi..
£29.95
Ex Tax:£24.96
For iPhone 12 Pro Max - Battery Replacement - 3687mAh - iP9 - Standard Capacity
Standard Capacity
Compatible with: iPh 12PM SKU: 0016027538037
iParts4u replacement batteries for the Apple iPhone 12 Pro Max have been thoroughly tested and meet or exceed the performance of the original Apple batteries. They are fully compatible with the original manufacturer's specifications.Features:3687 mAhOver Current/Discharge ProtectionFast Charging Sup..
£29.95
Ex Tax:£24.96
For iPhone 13 - Battery Replacement - 3530 mAh - iP9 - High Capacity
High Capacity Out Of Stock
Compatible with: iPh 13 SKU: 9503554221750
iP9 High Capacity replacement batteries for the Apple iPhone 13 have been thoroughly tested and meet or exceed the performance of original Apple batteries. They are fully compatible with the original manufacturer's specifications.Features:3530mAhOver Current/Discharge ProtectionFast Charging Support..
£35.95
Ex Tax:£29.96
For iPhone 13 Mini - Battery Replacement - 2450 mAh - IP9 - High Capacity
High Capacity
Compatible with: iPh 13M SKU: 9505843514727
iP9 High Capacity replacement batteries for the Apple iPhone 13 Mini have been thoroughly tested and meet or exceed the performance of original Apple batteries. They are fully compatible with the original manufacturer's specifications.Features:2450 mAhOver Current/Discharge ProtectionFast Charging S..
£35.95
Ex Tax:£29.96
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