Toshiba Satellite M30 PA3331U-1BAS 10.8V Replacement Battery
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Toshiba Satellite M30 PA3331U-1BAS 10.8V Replacement Battery - is backordered and will ship as soon as it is back in stock.
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Battery Care Tips
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
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
⚠️ 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.
Toshiba Satellite M30 PA3331U-1BAS 10.8V Replacement Battery - is backordered and will ship as soon as it is back in stock.
Voltage
10.8V
Amp
8800mAh
Toshiba Satellite M30-S3501 — 10.8V Li-ion Replacement Battery (PA3331U-1BAS)
This is a 10.8V, 8800mAh Li-ion battery for the Toshiba Satellite M30 series laptop. It replaces OEM part numbers PA3331U-1BAS, PA3331U-1BRS, PA3332U-1BAS, and PA3332U-1BRS. Fit models include the Satellite M30-S3501, M30-241, M30-S309, M30-154, and over 70 additional M30 variants.
- M30 series platform compatibility: These M30 variants share a common power rail at 10.8V and use the same physical connector and BMS handshake protocol. Swapping between PA3331 and PA3332 suffix part numbers is safe — Toshiba revised the part number mid-production without changing the electrical spec.
- Bench tested on actual hardware: We ran this cell on an M30-series chassis and monitored the BMS through charge and discharge cycles. The protection circuit tripped correctly at low-voltage cutoff and accepted a full charge without thermal event or BIOS rejection.
- Post-install calibration on the M30: After fitting this battery, run the laptop on battery only until it reaches hibernate cutoff — do not interrupt with AC. Then charge uninterrupted to 100%. This resets the M30's BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap.
BIOS reporting poor battery health immediately after fitting a new cell
The Satellite M30 BIOS stores battery health data in EEPROM tied to the original cell's charge history. When a new cell is installed, that stored data no longer matches the actual cell, so the BIOS flags it as degraded. This is not a fault with the replacement — it is stale data from the old battery. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% forces the BIOS to rewrite its battery profile. After that single learn cycle, the health warning clears.
Laptop shuts down abruptly at 20–30% charge shown on screen
This happens when the fuel gauge IC has not yet calibrated against the new cell's actual voltage curve. The OS reads 25% remaining, but the cell hits its low-voltage cliff under full CPU and display load before the gauge catches up. The shutdown is the BMS protecting the cell — not a defect. Run two full discharge-to-hibernate cycles without interruption, and the fuel gauge IC re-maps the curve accurately against the new cell chemistry. After calibration, cutoff aligns with the displayed percentage at approximately 10.8V nominal load.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Toshiba
- 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 Toshiba Satellite M30 says the battery is "unknown" or shows 0% right after I installed the new one — what's wrong?
The M30 BIOS pulls health and capacity data from EEPROM that was written by the original cell. A fresh cell has no matching EEPROM history, so the system reports it as unknown or empty. Run the laptop on battery only until it hibernates, then charge uninterrupted to 100%. That single learn cycle rewrites the EEPROM profile and the OS reads the battery correctly from that point.
The Satellite M30 shows a different Wh rating in system info than what the battery is rated at — is something wrong with the cell?
Nothing is wrong. The Wh figure shown in system info is pulled from the EEPROM data the cell reports, which reflects the OEM's rated chemistry parameters. The actual cell chemistry in a replacement may differ slightly at the cell level while still meeting the 10.8V / 8800mAh electrical spec. The number will stabilise after one or two full calibration cycles as the fuel gauge IC maps real capacity. Check the reading again after two full discharge-to-hibernate cycles — it should settle close to 95Wh.
The M30's fuel gauge is jumping around wildly — showing 60%, then 90%, then dropping to 15% within minutes of unplugging
The fuel gauge IC on the M30 uses the old cell's discharge curve as its reference. When a new cell with a different internal resistance is installed, the IC loses track of where it is on the voltage curve. This causes erratic percentage jumps, especially under variable CPU load. Run two complete discharge cycles to hibernate cutoff with no AC interruption — the IC recalibrates its reference curve against the new cell and the gauge stabilises by the third cycle.
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