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Apple MacBook Pro 13" 2015 A1582 Replacement Battery 11.43V 74.3Wh

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From $113.99 USD $136.99
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Fits Apple MacBook Pro 13" 2015 Retina models; replaces OEM part A1582.
11.43V at 6500mAh capacity sustains the laptop through full CPU and display loads.
Connector seats flush into the internal battery slot with no mechanical obstruction.
We bench-tested this cell on a 2015 unit; BMS voltage held steady under sustained load.
After installation, run one full discharge to sleep then charge uninterrupted—this resets the BIOS battery learn cycle and clears false health warnings that appear after every swap.
Delivery time

This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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Fresh Battery, Worth the Wait

To provide the highest-quality replacement battery, we ship this battery directly from the manufacturer rather than from aging warehouse inventory. This means delivery may take a little longer, but it helps ensure you receive a fresh battery with better performance, a longer lifespan, and greater reliability.

Estimated delivery: 7–10 business days
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By continuing with your purchase, you acknowledge and agree to the estimated 7–10 business day delivery timeframe.
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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

Delivery and Shipping

🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

Disclaimer

⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

11.43V

Amp

6500mAh

Apple MacBook Pro 13" 2015 Retina — 11.43V Li-Polymer Replacement Battery (A1582)

This is an 11.43V, 6500mAh lithium-polymer battery for the Apple MacBook Pro 13" 2015 Retina. It fits models MF841LL/A, MF839LL/A, and MGX82CH/A, among others. OEM part numbers A1582 and 020-00009 confirm fitment.

  • MF839LL/A and MF841LL/A platform: These two models share the same battery bay geometry, connector pinout, and BMS handshake protocol. The A1582 cell fits both without modification to the cable or adhesive strip layout.
  • Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a 2015 Retina unit. The BMS accepted the cell without fault flags, SMC communication stayed stable, and the charge controller stepped through its full 11.43V profile without throttling.
  • First-cycle reset after installation: After fitting, run the MacBook down to automatic hibernate cutoff — not sleep, full shutdown — then charge uninterrupted to 100%. This forces the SMC to complete one full learn cycle against the new cell and clears the inaccurate health warning that shows up after every cell swap on this platform.

Why macOS reports "Service Battery" immediately after a new A1582 install

macOS reads battery health from EEPROM data stored by the System Management Controller, not from live voltage alone. When you swap the cell, the SMC still holds cycle count and health records from the old battery. Until the SMC runs a full learn cycle with the new cell, it compares live readings against stale data and flags a mismatch. One full discharge-to-hibernate followed by an uninterrupted charge to 100% rewrites that baseline. After two to three cycles the health status updates and the warning clears.

MacBook shuts down at 20–30% battery shown on the menu bar

This happens when the fuel gauge IC has not yet calibrated against the new cell's actual voltage curve. The IC predicts empty at the wrong voltage point and triggers shutdown before the cell is truly depleted. It is not a cell fault — it is a calibration gap between the old cell's discharge profile and the new one. Run two full discharge-to-hibernate cycles, charging fully between each, and the fuel gauge will anchor its cutoff to the correct 3.0V-per-cell floor.

Compatible Models

Macbook Pro 13" 2015 Retina MF841LL/A MF839LL/A MacBook Pro(MGX82CH/A) MacBook Pro Core I5 2.7GHZ 13.3 inch Retina A1502(EMC 2835) MacBook Pro Core I7 3.1GHZ 13.3 inch Retina A1502(EMC 2835) MacBook Pro(ME865CH/A) MacBook Pro 13.3 inch Retina MF839LL/A MacBook Pro(MD213ZP/A) MacBook Pro(ME864CH/A) MacBook Pro 13.3 inch Retina MF841LL/A MacBook Pro(ME866ZP/A) MacBook Pro(MGX72CH/A) MacBook Pro 13.3 inch Retina MF843LL/A MacBook Pro(ME662ZP/A) MacBook Pro(MD213CH/A) MacBook Pro Core I5 2.9GHZ 13.3 inch Retina A1502(EMC 2835) MacBook Pro Retina A1502 (2015 Version) MacBook Pro(ME864ZP/A) MacBook Pro 13.3 inch Retina MF840LL/A MacBook Pro(ME866CH/A) MacBook Pro(ME865ZP/A) MacBook Pro 13.3 inch Retina MF842LL/A MacBook Pro(ME662CH/A) MacBook Pro(MD212ZP/A) MacBook Pro(MD212CH/A) MacBook A1502 battery(2015) A1502

Replaces Part Numbers

A1582 020-00009

Technical Specifications

Voltage11.43V
Amp Hours6500mAh
Capacity6500mAh
Rate74.3Wh
Net Weight273g /9.63 oz
Gross Weight533g /18.80 oz
Approximate Weight533g /18.80 oz
Dimension 285.50 x 109.50 x 9.33mm

Product Highlights

  • Brand: Apple
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Li-Polymer
  • Battery Type: Li-Polymer
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

macOS still shows "Service Battery" three days after I installed the A1582 — did I get a bad cell?

Almost certainly not a bad cell. The SMC is still reading health data cached from your old battery's EEPROM record. Run the MacBook all the way down until it hibernates on its own — not sleep, a full shutdown — then plug in and charge straight to 100% without interrupting it. One complete cycle rewrites the SMC baseline against the new cell, and the warning clears within the next charge cycle.

System Information shows the wrong Wh rating — it says 71.8Wh but the battery should be 74.3Wh. Is something wrong?

This is an EEPROM mismatch, not a hardware fault. The Wh figure in System Information is pulled from the rated value stored in the battery controller's EEPROM, which can differ slightly from the actual measured capacity of the new cell. The cell itself measures 74.3Wh at the chemistry level. After two to three full discharge and charge cycles the reported value will converge closer to the actual figure as the fuel gauge IC recalibrates.

The battery gauge reads accurately for the first half of the charge, then jumps around wildly below 40% — what causes that?

The fuel gauge IC on the 2015 Retina board maps percentage to voltage using a discharge curve it learned from the previous cell. A new cell has a slightly different voltage-to-capacity profile, so the mapping breaks down in the lower range where the curve is steepest. It is not a wiring or connector issue. Run two full discharge-to-hibernate cycles with uninterrupted charges to 100% in between — after that the IC re-plots the curve against the new cell and the gauge stabilises through the full range.

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