Dell Studio 1535 Replacement Battery 11.4V 4400mAh 312-0701
This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.
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Dell Studio 1535 Replacement Battery 11.4V 4400mAh 312-0701 - 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.
Dell Studio 1535 Replacement Battery 11.4V 4400mAh 312-0701 - is backordered and will ship as soon as it is back in stock.
Voltage
11.4V
Amp
4400mAh
Dell Studio 1535 / 1555 Series — 11.4V Li-ion Replacement Battery (312-0701)
This is an 11.4V, 4400mAh (50.16Wh) Li-ion replacement battery for the Dell Studio 1535, 1536, 1537, and 1555 laptops. It replaces OEM part numbers 312-0701, KM958, KM965, MT264, WU946, and several other Dell-issued part codes covering this platform. When the original cell degrades and the laptop stops holding a charge, this cell restores untethered operation.
- Studio 1535 / 1536 / 1537 / 1555 platform fit: These four models share the same battery bay geometry, connector pinout, and BMS communication protocol. Dell sourced multiple OEM part numbers across production runs — KM958, MT264, WU946, RM803, and others — but they all draw from the same 11.4V cell configuration with identical SMBus handshake logic.
- Bench tested on actual hardware: We ran this cell on a Studio 1535 and confirmed the BMS initialised correctly, the BIOS recognised the battery without error flags, and charge acceptance proceeded through all stages to 100% without the controller halting the cycle early.
- Post-install calibration on the Studio 1535: After fitting this cell, run the laptop on battery until it hibernates at low-charge cutoff, then charge uninterrupted to 100%. This single discharge-charge cycle resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap.
Why the Studio 1535 BIOS reports poor battery health after a cell swap
The Studio 1535 stores battery health data in the EEPROM of the original cell. When a new cell goes in, that EEPROM contains no accumulated charge history, so the BIOS reads it as degraded or unknown. This is a data mismatch, not a fault with the replacement cell. Running one full discharge-to-hibernate followed by a complete uninterrupted charge gives the BIOS enough cycle data to recalculate health accurately. After that single calibration pass, the health warning clears.
Laptop shuts down at 20–30% charge shown on the meter
This happens when the fuel gauge IC has not yet calibrated against the new cell's actual voltage curve. The gauge is still using the old cell's discharge profile, so it underestimates remaining capacity and triggers a low-voltage shutdown earlier than it should. The fix is the same calibration cycle: discharge fully to hibernate cutoff, then charge to 100% without interruption. After two to three full cycles, the fuel gauge IC locks onto the new cell's curve and the shutdowns stop. Confirm the cell is reading above 11.0V at the point the shutdown occurs — if it is, the gauge is the issue, not the cell.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Dell
- 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 Dell Studio 1535 BIOS is showing the new battery as "unknown" or giving a health warning — did I get a faulty cell?
No — this is an EEPROM mismatch, not a faulty cell. The BIOS reads health data stored in the old cell's EEPROM, and the replacement cell starts with no history. Run the laptop on battery until it hibernates at low-charge cutoff, then charge uninterrupted to 100%. That single learn cycle gives the BIOS enough data to recognise the cell correctly and clear the warning.
The battery meter on the Studio 1535 is all over the place — jumping from 60% to 15% with no warning — is the cell defective?
The fuel gauge IC is not defective — it is uncalibrated against the new cell's voltage curve. It is still using discharge data from the old cell, so the percentage readings are inaccurate until the IC maps the new chemistry. Run two to three full discharge-to-hibernate and charge-to-100% cycles without interruption. After those cycles, the IC locks onto the correct curve and the gauge stabilises.
Windows Device Manager is showing the wrong Wh rating for this battery — it says something lower than 50.16Wh — what is causing that?
The Wh figure in Device Manager is pulled from the EEPROM on the cell, which stores the rated design capacity at manufacture. The EEPROM value and the actual usable chemistry capacity can differ slightly depending on which OEM part number revision the EEPROM data was written for. This does not affect how the cell charges or discharges. If the discrepancy concerns you, check that the voltage reading at full charge reaches 12.6V — that confirms the cell is functioning correctly regardless of the displayed Wh figure.
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