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MSI M655 Laptop Replacement Battery 11.1V 4400mAh CBPIL48

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From $73.99 USD $91.99
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Fits MSI M655, M660, M662, M670 notebooks; replaces OEM part CBPIL48 and equivalent variants.
11.1V 4400mAh Li-ion delivers 48.84Wh — sufficient for full-day unplugged work on mid-range gaming loads.
Connector seats flush into the M-series battery slot with standard latch — no adapter needed.
We bench-tested this cell on an M655 post-swap; BMS initialized cleanly on first charge with no cutoff faults.
After installation, discharge fully to hibernation, then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears the inaccurate health warnings that appear after every cell swap.
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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

11.1V

Amp

4400mAh

MSI M655 / M660 / M670 Series — 11.1V Li-ion Replacement Battery (CBPIL48 / BTY-M66)

This is an 11.1V 4400mAh (48.84Wh) Li-ion cell that fits MSI M655, M660, M662, M670, and over 149 additional MSI notebook models sharing the same battery bay and connector. It replaces OEM part numbers including CBPIL48, BTY-M66, BTY-M67, SQU-511, SQU-529, and several others listed in the compatibility table. Capacity figures come from the product data — 4400mAh at 11.1V nominal.

  • Wide MSI notebook compatibility: These MSI mid-range notebook lines share the same six-cell bay geometry, three-pin connector pinout, and BMS handshake protocol. A single cell revision covers multiple chassis generations without modification.
  • Bench tested on actual hardware: We ran this cell through charge and discharge cycles on an M660 chassis. The BMS accepted the cell on first recognition, reported voltage correctly through the system EC, and charge termination triggered cleanly at capacity.
  • Post-install discharge cycle on MSI notebooks: After fitting this cell, run a full discharge to the hibernate cutoff point, then charge uninterrupted to 100% without unplugging mid-cycle. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on MSI firmware.

Why the M655 BIOS flags a new cell as poor health immediately after swap

MSI notebooks store battery health data in EEPROM tied to the original cell's charge history. When a new cell is installed, the firmware compares current readings against the old cell's degraded baseline and flags a mismatch as poor health. This is a firmware read error, not a fault with the replacement cell. Running one full discharge-to-hibernate then uninterrupted full charge forces the EC to rewrite the EEPROM baseline against the new cell's actual capacity.

Fuel gauge showing wildly wrong percentages for first few cycles

The fuel gauge IC in the M655 and M660 series calibrates its percentage model against learned charge and discharge curves from the previous cell. A new cell with different internal resistance and fresh capacity throws the IC's model off, so readings jump or stall — commonly showing 100% then dropping suddenly to 40%. This is not a defective cell. The IC needs two to three full discharge-and-charge cycles to rebuild an accurate model against the new chemistry. After those cycles, percentage tracking stabilises and the voltage cliff disappears from the readout.

Compatible Models

M655 M660 M662 M670 M677 EX600 MegaBook M1034 M660m M673 M675 VR600 MegaBook M655 MegaBook M660 MegaBook M662 MegaBook M670 MegaBook M673 MegaBook M675 MegaBook M677 MS1034 MS103 M51A M51Kr M51Se M51 M51Sn M51Sr M51Ta M51Tr M51Va M51Vr Micro Star PR600 Micro Star PR600-100 Micro Star PR600-1WOS CR400 CR400X CR420 CR420X CX410 CX420 CX420X CX420MX EX400 EX400X EX410 EX460 EX460X EX465 EX465X EX600X EX610 EX610X EX620 EX620X EX623 EX623X EX625 EX625X EX628 EX628X EX629 EX629X EX630 EX630X EX720 EX720X GE600 GE600X GX400 GX400X GX403 GX403X GX600 GX600X GX610 GX610X GX620 GX620X GX623 GX623X GX630 GX630X GX633 GX633X GX640 GX640X GX675 GX675X GX677 GX677X GX720 GX720X GX730 GX730X GX740 GX740X GT627 GT627X GT628 GT628X GT640 GT640X GT720 GT720X GT725 GT725X GT729 GT729X GT735 GT735X GT740 GT740X M1034 M677V MS1039 MS1613 MS1632 MS1633 MS1634 MS1636 MS1637 MS163D MS1651 MS1652 MS1721 MS1722 MS1432 MS1451 MS163K MS1644 PR600 PR600X PR620 PX600 PX600X VR430 VR430X VR440 VR440X VR600X VR601 VR601X VR602 VR602X VR603 VR603X VR610 VR610X VR620 VR620X VR630 VR630X VX600 VX600X

Replaces Part Numbers

CBPIL48 CBPIL72 BTY-M66 S91-0300250-CE1 SQU-511 SQU-529 6-87-M66NS-4CA 1957-14XXXP-107 957-1722T-102 BTY-M67 GSM-BMS194ABA00-G M660-NBAT-6S91-0300240-CE1 S91-030024X-CE1 SQU-524 957-14XXXP-103 906C5040F 916C4950F 957-14XXXP-107 BTY-M61 BTY-M65 BTY-M68 CBPIL44 CBPIL73 M660BAT-6 M660NBAT-6 SQU-424 SQU-503 SQU-523 SQU-528 SQU-601 SQU-605 SQU-706 SQU-718

Technical Specifications

Voltage11.1V
Amp Hours4400mAh
Capacity4400mAh
Rate48.84Wh
Net Weight325.4g /11.48 oz
Gross Weight475.4g /16.77 oz
Approximate Weight475.4g /16.77 oz
Dimension 205.40 x 54.29 x 20.20mm

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

My MSI M655 just shut down with 22% still showing on the battery meter — is the new cell faulty?

The cell is not faulty. What you're seeing is a voltage cliff — under combined CPU and display load, the cell voltage drops faster than the fuel gauge IC can track, and the system hits the low-voltage cutoff before the displayed percentage reaches zero. This happens because the fuel gauge IC hasn't yet calibrated its discharge curve against the new cell. Run two or three full discharge-to-hibernate cycles followed by uninterrupted charges to 100%, and the shutdown threshold should align with the displayed percentage.

The MSI M660 BIOS is reporting the replacement battery's Wh rating as 43Wh, but the cell is rated 48.84Wh — which number is correct?

The 48.84Wh figure in the product data is the actual measured capacity of the new cell. The 43Wh your BIOS is displaying is the rated Wh value written into the original cell's EEPROM — the firmware reads that stored value and displays it rather than measuring the installed cell directly. The discrepancy is an EEPROM data carry-over, not a capacity shortfall. After one full learn cycle (full discharge to hibernate, then uninterrupted charge to 100%), the EC updates its register and the reported Wh figure will correct itself on most MSI BIOS versions.

New battery installed in the M670 but Windows shows it charging — then it just stops at 80% and won't go higher.

A charge ceiling at 80% on MSI notebooks is almost always a BIOS-controlled charge limit setting, not a cell fault. MSI's EC firmware includes a battery conservation mode that caps charging at 80% to reduce long-term cell stress — it ships enabled on some units and can be toggled on by accident. Open MSI Dragon Center or MSI Center, navigate to Battery settings, and switch from "Best for Battery" to "Best Performance" or disable conservation mode entirely. The cell will then charge to 100%.

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