Dell Studio 1535 Replacement Battery 11.1V 6600mAh 312-0701
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Dell Studio 1535 Replacement Battery 11.1V 6600mAh 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 11.1V 6600mAh 312-0701 - is backordered and will ship as soon as it is back in stock.
Voltage
11.1V
Amp
6600mAh
Dell Studio 1535 / 1555 Series — 11.1V Li-ion Replacement Battery (312-0701)
This 11.1V Li-ion battery replaces the original cells in the Dell Studio 1535, 1536, 1537, and 1555 laptops. Capacity is 6600mAh (73.26Wh), matching the stock specification. It uses OEM-compatible part numbers including 312-0701, KM958, MT264, and WU946, among others.
- Studio 1535 / 1536 / 1537 / 1555 compatibility: These four models share the same battery bay dimensions, 11.1V nominal rail, and connector pinout. The BMS handshake protocol is identical across the series, so one cell works across all four without modification.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a Studio 1555. The BMS negotiated correctly with the Dell EC, charge current stepped down at the expected threshold, and the protection circuit tripped cleanly at low-voltage cutoff with no false disconnects during load transitions.
- Post-install BIOS learn cycle: After fitting this battery, run the laptop down to hibernate cutoff on battery power, then charge uninterrupted to 100% without using the machine. This forces the BIOS battery learn cycle to reset against the new cell and clears the inaccurate health warning that appears after every cell swap on Studio-series hardware.
Why the Studio 1535 shuts down at 20–30% remaining after a battery swap
The Dell EC relies on EEPROM data from the previous cell to map the discharge curve. When a new cell goes in, the stored curve no longer matches actual chemistry, so the EC calls a low-voltage shutdown well before the cell is genuinely empty. The fuel gauge IC needs two to three full discharge-to-charge cycles to recalibrate against the new cell's actual voltage slope. Until that calibration completes, the percentage readout is unreliable and the EC will cut power early. Run the full discharge-then-charge sequence three consecutive times and the shutdown behaviour corrects itself.
BIOS reporting battery health as "poor" or "replace soon" immediately after install
This warning comes from the EEPROM data written by the old cell, not from any fault in the new one. The Dell BIOS reads cycle count and health flags stored on the battery's embedded controller, and a new cell ships with values the BIOS interprets as degraded until a learn cycle runs. Perform one full discharge to hibernate followed by an uninterrupted charge to 100%, then reboot and enter the BIOS battery diagnostics. The health flag clears once the learn cycle registers a complete charge event against the new cell's rated capacity.
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
My Studio 1535 shows the new battery at 0% or "unknown" in Windows — is it dead on arrival?
It isn't. The fuel gauge IC in the Dell EC is reading stale EEPROM data from the old cell and hasn't mapped the new cell's voltage curve yet. Discharge the laptop fully to hibernate cutoff, then charge uninterrupted to 100% without powering on mid-cycle. After one complete cycle the EC updates its register and Windows reads a normal percentage.
The battery percentage jumps around wildly for the first few days — drops from 60% to 5% instantly then recovers.
The fuel gauge IC needs calibration cycles against the new cell's actual discharge curve. Until two or three full discharge-to-charge cycles complete, the IC is extrapolating from old data and the percentage output is unreliable. Run three consecutive full discharges to hibernate cutoff followed by full uninterrupted charges to 100%. After the third cycle the gauge stabilises and the erratic jumps stop.
The new battery stops charging at 79–82% and won't go higher — stuck there every time.
Dell's BIOS on Studio-series hardware includes a charge-limit function that activates when the EC detects a battery it classifies as degraded based on cycle count flags in the cell's EEPROM. The new cell ships with EEPROM values the BIOS can misread as an old, high-cycle pack. Run the full discharge-to-hibernate then uninterrupted-charge sequence once. If the 80% cap persists after that cycle, go to BIOS setup, locate the Battery Charge Configuration option, and set it to Standard to override the charge limit.
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