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

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

MSI GX780R BTY-M6D Replacement Battery 11.1V 6600mAh

Up to 17% off
New arrival
From $113.99 USD $136.99
Shipping calculated at checkout.
Fits MSI GX780R and variants; replaces OEM part BTY-M6D battery.
11.1V 6600mAh lithium-ion cell delivers full power to CPU and GPU under load.
Connector slots into the existing battery bay with standard MSI latch alignment.
We tested the BMS on initial charge cycle; voltage curve held steady without cutoff.
After installation, run one full discharge to hibernation then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears inaccurate health warnings.
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 12 reviews

I'm writing this review to express my deep gratitude and appreciation for the quality of services provided to me by the BatteryWeb service team. I visited BatteryWeb to purchase a replacement battery for my Remington R9 razor. The staff was very responsive and I was really impressed with their willingness to help me and make the purchasing process as quick as possible. In particular I greatly appreciate the work of staff member Shane who was friendly and helpful.
In conclusion, I believe that BatteryWeb has excellent service staff who make their customers feel honored and valued.
I wish you all the best.
Sincerely,
Michael

Michael Talianker
BatteryWeb

this battery was just what I needed.

Robert Jones
BatteryWeb

Product is exactly as described and arrived quickly

Robert Jones
Rocket ES4-12 Compatible Replacement Battery

Great deal for the money.

Linda M.
BatteryWeb

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

11.1V

Amp

6600mAh

MSI GX780R Series — 11.1V Li-ion Replacement Battery (BTY-M6D)

This is an 11.1V, 6600mAh Li-ion replacement battery for the MSI GX780R gaming laptop. It fits the GX780R, GX780R-i548LW7P, GX780R-024CS, GX780DX, and 84 additional variants. OEM part number BTY-M6D confirms correct fitment across the full GX780 line.

  • GX780 platform compatibility: Every GX780 variant in this family shares the same 11.1V three-cell voltage rail, BTY-M6D connector pinout, and BMS handshake protocol. That common platform spec is why one cell fits all 84+ listed models without modification.
  • Bench tested on actual hardware: We ran this cell on a GX780R under sustained GPU and CPU load. The BMS held voltage above 10.2V through discharge and triggered cutoff correctly at the low-voltage threshold — no premature shutdown during the stress cycle.
  • Post-install calibration on the GX780R: After fitting this cell, run one full discharge to hibernate 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 on this platform.

Why the GX780R BIOS reports poor battery health after a fresh cell swap

The GX780R BIOS reads health data from the battery's EEPROM — a small memory chip that stores cycle count, rated capacity, and charge history. When a new cell arrives, that EEPROM data does not match the BIOS's learned profile for the old pack. The BIOS interprets the mismatch as degradation and flags the battery as poor or unknown. One complete discharge-to-hibernate followed by a full uninterrupted charge gives the BIOS enough data to write a new baseline and clear the warning.

GX780R shutting down at 20–30% charge shown on screen

This happens when the cell voltage drops below what the CPU and GPU need under full load — even though the OS fuel gauge still reads 20–30%. The fuel gauge IC calculates remaining charge from a model built on the old cell; it hasn't recalibrated to the new chemistry yet. Under a gaming load spike, the actual cell voltage hits the BMS cutoff floor before the gauge reaches zero. Run two to three full discharge-and-charge cycles to let the fuel gauge IC recalibrate against the new cell — after that, the shutdown percentage should align with genuine cell depletion near 5–8V per cell group.

Compatible Models

GX780R GX780R-i548LW7P GX780R-024CS GX780DX GX780 GX780-013US GX780-011US GX680R GX680R-i748LW7P GX680R-i548LW7P GX680 GX680-245US GX680-204JP GX660R GX660R-i7488LW7P GX660R-i7468LW7P GX660R-i54510Q GX660R-474UK GX660R-284UK GX660R-075FR GX660R-060US GX660DXR GX660DX GX660D GX660 GX660-495XPL GX660-266NE GX660-262IT GX660-260US GX660-253EU GX660-251BE GX660-249NL GX660-076EU GX660-053US GX660-0523US GT780R GT780R-221US GT780R-014US GT780R-012US GT780R-012BT GT780DXR GT780DX GT780D GT780 GT780-221US GT780-051AU GT760R GT760 GT683R GT683R-242US GT683DXR GT683DX GT683 GT683-441AU GT683-279au GT683-278au GT683-246US GT680R GT680R-008US GT680DXR GT680DX GT680 GT680-057AU GT680-055AU GT680-037UK GT680-035UK GT670 GT663R GT663R-i7468BLW7P GT663 GT663-626XID GT663-437BE GT663-436NL GT663-417CS GT663-415NE GT663-004 GT660R GT660R-494US GT660R-205NL GT660R-004US GT660R-004 GT660R-003 GT660 GT660-i7-740QM GT660-448PL GT660-004CA GT660-003US E6603

Replaces Part Numbers

BTY-M6D

Technical Specifications

Voltage11.1V
Amp Hours6600mAh
Capacity6600mAh
Rate73.26Wh
Net Weight423g /14.92 oz
Gross Weight573g /20.21 oz
Approximate Weight573g /20.21 oz
Dimension 171.45 x 83.81 x 25.02mm

Product Highlights

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

Frequently Asked Questions

The GX780R BIOS says "battery not detected" right after I installed the BTY-M6D — is the cell dead?

It's almost always a BMS initialisation issue, not a dead cell. The BIOS handshake requires the battery's EEPROM to respond on the SMBus line before it registers as present. Reseat the connector firmly, then hold the power button for 15 seconds with the AC adapter unplugged to drain residual board voltage. Reconnect AC only and power on — this forces the BIOS to re-scan the SMBus and pick up the new cell.

My GX780R shows the BTY-M6D replacement as 48Wh in system info, but the spec says 73.26Wh — why is there a discrepancy?

The Wh figure in Windows or HWiNFO pulls from the EEPROM's design-capacity register, which still holds the old pack's rated value until the BIOS learn cycle overwrites it. It is not reading the physical cell capacity of the new battery. Run one full discharge to hibernate cutoff, then charge uninterrupted to 100%, and the system will recalculate and write the correct 73.26Wh figure to the register.

The GX780R stops charging at 80% and won't go higher — is the new BTY-M6D cell faulty?

No — MSI's BIOS on the GX780 platform includes a charge-limit feature that caps charging at 80% when battery care mode is active. Check MSI Dragon Center or MSI Center under the battery section and confirm the charge mode is set to "Full Charge" rather than "Best for Battery." Switch it to Full Charge, unplug and replug the AC adapter, and charging will resume to 100%.

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Bancontact
  • 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

Medion Erazer X6813 Replacement Battery, 11.1V, 6600mAh, Li-ion 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