Toshiba Portege R30 Replacement Battery PA3524U-1BAS 11.1V
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Toshiba Portege R30 Replacement Battery PA3524U-1BAS 11.1V - 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 Portege R30 Replacement Battery PA3524U-1BAS 11.1V - is backordered and will ship as soon as it is back in stock.
Voltage
11.1V
Amp
4400mAh
Toshiba Portege R30 Series — 11.1V Li-ion Replacement Battery (PA3524U-1BAS)
This 11.1V, 4400mAh (48.84Wh) Li-ion battery replaces the original cell in the Toshiba Portege R30, R30-A, and R30-A-1C0/1C4 series notebooks. It matches the OEM voltage rail and connector pinout used across the R30 platform. Swap it in when the original cell no longer holds adequate charge for untethered work.
- R30 platform fit: The R30, R30-A, and sub-variants all share the same 11.1V three-cell configuration, identical battery bay dimensions, and the same connector pinout — so one cell covers the full range without modification.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on the R30-A platform. The BMS communicated correctly with the Toshiba EC, accepted a full charge without tripping the over-voltage cutoff, and reported state-of-charge without EEPROM conflict.
- Post-install calibration on the R30: After fitting this cell, run one full discharge until the laptop hibernates at its cutoff threshold, then charge uninterrupted to 100%. This forces the fuel gauge IC to re-learn the new cell's capacity curve and clears the inaccurate battery health warning that appears in Toshiba's power utility after every cell swap.
BIOS reporting poor battery health immediately after fitting the R30 replacement
The Toshiba R30 BIOS reads battery health from EEPROM data embedded in the cell's BMS circuit. When a new cell is installed, that EEPROM carries fresh data the BIOS hasn't seen before — it flags the mismatch as poor health rather than recognising a new battery. This is a firmware interpretation issue, not a fault with the cell. Running one complete charge-discharge learn cycle allows the EC to update its internal table against the new EEPROM values. After the cycle completes and the battery sits at 100%, the health warning clears on the next cold boot.
Portege R30 shutting down at 20–30% charge shown on screen
This happens when the cell voltage drops below the BMS cutoff threshold under full load — CPU boost plus display — while the fuel gauge IC still reads 20–30% remaining. The gauge is calibrated to the old cell's discharge curve, so it overestimates capacity in the lower range. The cell itself hits roughly 9.9V at that load before the gauge expects it, triggering an immediate shutdown. Complete two full calibration cycles — discharge to hibernate, charge uninterrupted to 100% — and the fuel gauge IC will map the new cell's actual voltage cliff. After calibration, the displayed percentage at shutdown should drop below 5%.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Toshiba
- Manufacturer: CS
- Series: Standard
- Color: Silver
- Product Type: Li-ion
- Battery Type: Li-ion
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
The Toshiba Power Saver utility shows a different Wh rating than what's printed on the new battery — is something wrong?
Nothing is wrong with the cell. The Wh figure the utility displays is pulled from the EEPROM on the BMS circuit, which stores the rated chemistry value the manufacturer programmed at the factory. The number on the label reflects the actual measured capacity of this specific cell. The two figures can differ slightly depending on how the OEM calculated nominal versus measured Wh. No action is needed — the discrepancy is cosmetic and does not affect charge or discharge behaviour.
The R30 fuel gauge is jumping around wildly — showing 60%, then 80%, then 45% within minutes of each other. What causes that?
The fuel gauge IC inside the R30 uses a learned discharge curve from the old cell to estimate state-of-charge. With a new cell installed, the curve it has stored doesn't match the new cell's actual voltage behaviour, so the gauge interpolates incorrectly and produces erratic readings. Run two complete cycles — discharge fully to the hibernate cutoff, then charge uninterrupted to 100% both times. After the second cycle the fuel gauge IC will have enough data points to track the new cell accurately.
The replacement battery stopped charging at 80% and won't go higher — is the cell faulty?
This is almost always a BIOS-controlled charge limit, not a fault with the cell. Many Toshiba R30 units ship with an eco-charge or battery care setting enabled in the BIOS or Toshiba Settings utility that caps charging at 80% to reduce cell wear. Go into the Toshiba Settings application under Windows, find the battery care mode or eco-charge option, and set it to full charge mode. If the BIOS has a similar setting, disable it there too. After the next charge cycle the battery should reach 100%.
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