Welcome to our store. Your trusted source for batteries and power solutions. Learn more

For support or quotes: sales@batteryweb.com
WELCOME5
BatteryWeb

Apple MacBook Pro 14 2021 A2519 Replacement Battery 11.47V 6050mAh

Up to 19% off
New arrival
From $78.99 USD $97.99
Shipping calculated at checkout.
Fits Apple MacBook Pro 14 2021 models; replaces OEM battery part number A2519.
11.47V and 6050mAh capacity restores full charge cycles on this 14-inch MacBook Pro.
Connector seats flush into the internal battery slot with the locking tab oriented toward the logic board.
We cycled this cell on a 2021 MacBook Pro 14; the BMS accepted the new pack and reported accurate voltage across all charge states.
After installation, run one complete discharge to hibernation cutoff, then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap.
Delivery time

This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
WECARE5
Visa Mastercard American Express PayPal Apple Pay Google Pay Shop Pay Discover Klarna Afterpay Stripe
✦

Check that your old battery model number and device model to match our description. This makes sure they work together.

✦

We ship your order same day if you buy it before 4 PM EST.

Warranty

Let customers speak for us

from 11 reviews

Product is exactly as described and arrived quickly

Robert Jones
Rocket ES4-12 Compatible Replacement Battery

It took a bit longer than expected, likely due to the holiday season, but that was understandable. So far, the battery seems to be working well!

Linda M.
MGE UPS Systems Pulsar EX 1500RT Compatible Replacement Battery By Bright Way

Excellent substitute for the original, appearing to be the perfect replacement.

Alberto J.
APC SMART-UPS RT SURTA3000RMXL3U UPS High Performance Replacement Battery Set

It was what i was looking for. Support is fast

Jaswal
WAHEGURUG - RADHASWAMI

Fast service

Mark Casias
BatteryWeb

Perfect fit

Mark Casias
STX20L-BS Battery for Harley Softail FLS FLST 1991-2017 High Performance

Works Perfectly!!

Ben Benson
Invacare 220 Scooter High Performance Medical Replacement Battery Set

Send Your Battery Photo

Expert Technician Help

Snap a photo or video of your battery and send it to us. We'll identify the exact replacement—fast and hassle-free. Our team has helped thousands of customers find the right battery quickly and easily.

POST YOUR BATTERY IMAGE
Product & Solutions Expert

Product & Solutions Expert

✉ sales@batteryweb.com

🔹 10+ Years Battery Experience 🔹 Fast & Accurate Identification

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

11.47V

Amp

6050mAh

Apple MacBook Pro 14 2021 — 11.47V Li-Polymer Replacement Battery (A2519)

This is an 11.47V, 6050mAh (69.39Wh) lithium-polymer battery for the Apple MacBook Pro 14 2021. It fits models A2442, EMC3650, and MKGR3LL/A, among others. Direct swap for a degraded or failed A2519 cell.

  • MacBook Pro 14 2021 compatibility: All listed A2442 variants share the same three-cell Li-Polymer stack, 11.47V rail, and SMC power handshake. The connector pinout and BMS communication protocol are identical across the EMC3650 production run, so one cell fits the full range.
  • Bench tested on actual hardware: We cycled this cell through charge, discharge, and SMC handshake verification on a MacBook Pro 14 2021 unit. The BMS reported correct voltage and capacity data, and the SMC accepted the cell without triggering a service warning on first boot.
  • Post-install calibration on macOS: After fitting this cell, run one full discharge until the laptop hibernates on its own, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this platform.

macOS reporting battery health as "Poor" immediately after replacement

The SMC and macOS System Information pull health data from EEPROM stored on the old battery's BMS. When a new cell lands in the same slot, the fuel gauge IC has no learned data to work from, so macOS flags the health state as unknown or poor. This is not a cell fault. Run two full discharge-to-hibernate and charge-to-100% cycles. After both cycles, the fuel gauge IC recalibrates against the new cell chemistry and macOS will report accurate health.

MacBook Pro shuts down at 20–30% charge shown on screen

This happens when the fuel gauge IC's state-of-charge map no longer matches the new cell's actual voltage curve. Under combined CPU and display load, the cell hits a voltage cliff that the uncalibrated gauge did not predict, and the SMC triggers an emergency shutdown. The percentage reading on screen is wrong — the cell still has charge but the system cannot see it accurately. Discharge fully to hibernate, then charge to 100% without interruption, and repeat once more to align the gauge to the new cell's discharge profile.

Compatible Models

MacBook Pro 14 2021 A2442 EMC3650 MKGR3LL/A MKGP3LL/A MKGT3LL/A MKGQ3LL/A

Replaces Part Numbers

A2519 080-333-4000

Technical Specifications

Voltage11.47V
Amp Hours6050mAh
Capacity6050mAh
Rate69.39Wh
Net Weight225g /7.94 oz
Gross Weight485g /17.11 oz
Approximate Weight485g /17.11 oz
Dimension 256.90 x 79.30 x 8.50mm

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 says the battery is at 0% and won't read it at all after I put the new one in — what's wrong?

The SMC is reading stale EEPROM data from the old cell and has not yet initialised the new one. Hold Shift + Control + Option + Power for 10 seconds to reset the SMC, then boot normally and plug in the charger. The fuel gauge IC needs a live charge cycle to register the new cell. After one full charge to 100%, macOS will display a real percentage.

System Information shows the battery Wh rating as lower than the spec — is this cell underrated?

System Information pulls the Wh figure from the cell's EEPROM, which stores the manufacturer's rated capacity at the time of production. The actual usable energy can read slightly different until the fuel gauge IC runs calibration cycles against the new cell's chemistry. This is an EEPROM reporting difference, not a sign the cell is underspec. Run two full discharge-to-hibernate and charge-to-100% cycles and the reported Wh will stabilise.

The battery stops charging at 80% and never goes higher — is the new cell faulty?

This is almost always the macOS Optimized Battery Charging setting, not a cell fault. macOS learns your daily charging pattern and deliberately holds charge at 80% until it predicts you need a full charge. Go to System Settings → Battery → Battery Health → turn off Optimized Battery Charging. The cell will then charge to 100% on the next charge cycle.

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Related Products

Apple MacBook Pro 14 2021 Replacement Battery, 11.47V, 6050mAh, Li-Polymer 1

Engineered for Performance. Built to Last.

Check out our top-rated selection of reliable products built to last. We offer high-quality options that deliver consistent performance for all your needs.

Our Collections