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Dell Inspiron 15 7559 Compatible Battery 11.4V 6400mAh 357F9

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From $112.99 USD $135.99
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Fits Dell Inspiron 15 7559 and replaces OEM part numbers 357F9, 71JF4, 00GFJ6, 071JF4, P57F002, P57F003, P65F, P65F001.
11.4V, 6400mAh lithium-polymer cell matches the original's voltage and capacity for full system compatibility without BIOS errors.
Connector type is the standard Dell proprietary four-pin contact; orientation is keyed — cell locks into the bay slot without force.
We bench-tested this cell in the INS15PD chassis; BMS accepted the pack on first insertion with no fault codes or charge limiting.
After installation, run one full discharge to hibernation cutoff then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears inaccurate health warnings that appear after every cell swap.
Delivery time

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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To provide the highest-quality replacement battery, we ship this battery directly from the manufacturer rather than from aging warehouse inventory. This means delivery may take a little longer, but it helps ensure you receive a fresh battery with better performance, a longer lifespan, and greater reliability.

Estimated delivery: 7–10 business days
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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.

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⚠️ 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

11.4V

Amp

6400mAh

Dell Inspiron 15 7559 — 11.4V Li-Polymer Replacement Battery (357F9)

This 11.4V, 6400mAh (72.96Wh) lithium-polymer battery replaces the original 357F9 cell in the Dell Inspiron 15 7559 and INS15PD family. It fits the internal bay directly and connects via the standard Dell multi-pin harness. Voltage and capacity match the OEM specification from the product data above.

  • Inspiron 15 7559 and INS15PD series fit: These models share the same 11.4V three-cell architecture, identical connector pinout, and the same BMS handshake protocol — the battery management system expects the 357F9 EEPROM signature to clear the health warning on boot.
  • Bench tested on actual hardware: We cycled this cell through full charge and discharge on a 7559 unit, confirmed the BMS accepted the handshake without fault codes, and verified the fuel gauge IC registered the correct 72.96Wh rating in Dell Power Manager after two calibration cycles.
  • Post-install calibration on the 7559: After fitting, run the laptop down to hibernate cutoff on battery alone — no AC — then charge uninterrupted to 100% without powering on. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears immediately after every cell swap on this platform.

Why the 7559 shuts down at 20–30% shown after a battery swap

The 7559's fuel gauge IC maps voltage curves from the previous cell's EEPROM data. A new cell has a different internal resistance profile, so the gauge loses accuracy at the knee of the discharge curve — usually around 11.0V under load. The system hits the emergency shutdown threshold before the displayed percentage reaches zero. Two full discharge-to-hibernate and charge-to-100% cycles recalibrate the IC against the new cell's actual voltage curve, and the premature shutdowns stop.

BIOS reporting the replacement battery as "unknown" or 0% on first boot

On first insertion, the Dell BIOS reads the cell's EEPROM and compares the stored chemistry data against its expected signature. If the EEPROM hasn't been validated against the platform yet, the BIOS flags the battery as unknown and the gauge reports 0% until the learn cycle completes. Plug in AC power, let the battery charge to 100% uninterrupted, then perform one full discharge to hibernate. After that cycle, reboot and check Dell Power Manager — it should display the correct 72.96Wh rating and a valid health status.

Compatible Models

Inspiron 15 7559 INS15PD INS15PD-1548B INS15PD-1548R INS15PD-1748B INS15PD-1748R INS15PD-2548R INS15PD-2548B INS15PD-2748R INS15PD-3948B INS15PD-1848B INS15PD-3848B INS15PD-2748B Ins 15-7567-D1545B Inspiron i7559-763BLK Ins 15-7567-D1645P Ins 15-7567-D1845B Ins 15-7567-D1645B INS15-7566-D1645B Ins 15-7567-D4745B Ins 15-7567-D3645B INS15-7566-D1845B Ins 15-7567-D2745B Ins 15-7567-D4545B Inspiron i7559-7512GRY INS15-7566-D1545R Ins 15-7567-D4645B Ins 15-7567-D1745B Ins15-7567-D2545B Ins 15-7567-D4645R INS15-7566-D1745R Ins 15-7567-D1745P Ins 15-7567-D2645B INS15-7566-D1545B Ins 15-7567-D1865B Ins 15-7567-D2545P Inspiron i7559-2512BLK INS15-7566-D1745B Ins 15-7567-D1545R Inspiron 5576 Inspiron 5577 Inspiron 15 7000 7567 Gaming Inspiron 15 7557 Inspiron 7759 Inspiron 15 5576 Inspiron 15-7557 Inspiron 15 7000 7567 Inspiron 15 5577 Inspiron 15 7566 Inspiron 7566 Inspiron 15 7567 Inspiron 15-7567 Inspiron 7567 Inspiron 15 7000 7559 Inspiron 15-7559 INSPIRON 7559 Inspiron 15 7000 Inspiron 15-7567-D1545B Inspiron 15-7567-D1645P Inspiron 15-7567-D1845B Inspiron 15-7567-D1645B Inspiron15-7566-D1645B Inspiron 15-7567-D4745B Inspiron 15-7567-D3645B Inspiron 15-7566-D1845B Inspiron 15-7567-D2745B Inspiron 15-7567-D4545B Inspiron 15-7566-D1545R Inspiron 15-7567-D4645B Inspiron 15-7567-D1745B Inspiron15-7567-D2545B Inspiron 15-7567-D4645R Inspiron 15-7566-D1745R Inspiron 15-7567-D1745P Inspiron 15-7567-D2645B Inspiron 15-7566-D1545B Inspiron 15-7567-D1865B Inspiron 15-7567-D2545P Inspiron 15-7566-D1745B Inspiron 15-7567-D1545R Inspiron 15PD-2548B Inspiron 15PD-1848B Inspiron 15PD-3848B Inspiron 15PD-1748R Inspiron 15PD-2548R Inspiron 15PD-1748B Inspiron 15PD-2748B Inspiron 15PD-2748R Inspiron 15PD-3948B Inspiron 15PD-1548R

Replaces Part Numbers

357F9 71JF4 00GFJ6 071JF4 P57F002 P57F003 P65F P65F001

Technical Specifications

Voltage11.4V
Amp Hours6400mAh
Capacity6400mAh
Rate72.96Wh
Net Weight341g /12.03 oz
Gross Weight481g /16.97 oz
Approximate Weight481g /16.97 oz
Dimension 189.70 x 100.30 x 11.10mm

Product Highlights

  • Brand: Dell
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Li-Polymer
  • Battery Type: Li-Polymer
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

Why does my Dell Inspiron 15 7559 still show "plugged in, not charging" after fitting the new 357F9 battery?

This is a BIOS charge-limit flag that carries over from the old cell — it does not mean the replacement is faulty. Dell's firmware sometimes locks charging when it detects a new EEPROM signature it hasn't validated yet. Shut the laptop down completely, disconnect AC for 30 seconds, then reconnect and boot into the BIOS setup screen (F2 at POST) and exit without changes. This forces the BIOS to re-initialise the battery controller and clears the charge-lock on most 7559 units.

The battery percentage on my 7559 jumps around wildly — drops from 60% to 15% instantly, then climbs back up. What's happening?

The fuel gauge IC on the 7559 motherboard is still using the voltage-to-capacity map it learned from the degraded original cell. A new lithium-polymer cell has a steeper, more stable discharge curve, and the old map creates large estimation errors — especially between 40% and 20%. Run two complete discharge-to-hibernate cycles followed by uninterrupted charges to 100% with no use during charging. After the second cycle, the gauge IC recalibrates against the new cell's actual curve and the percentage readings stabilise.

Dell Power Manager shows the wrong Wh rating — 56Wh instead of 72.96Wh — after I installed the replacement battery. Is something wrong with the cell?

Nothing is wrong with the cell itself. The Wh figure in Dell Power Manager pulls from the EEPROM data stored on the battery's internal circuit board, and that value won't update until the BIOS completes a full battery learn cycle. The physical cell is 72.96Wh as rated. Charge to 100% uninterrupted, discharge fully to hibernate, then charge again without interruption — after that cycle, open Dell Power Manager and the reported Wh value should correct to 72.96Wh.

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