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Dell XPS 15 9500 Replacement Battery 11.4V 4550mAh 8FCTC

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From $113.99 USD $137.99
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Fits Dell XPS 15 9500 laptops; replaces OEM part numbers 8FCTC, DVG8M, and P8P1P.
11.4V and 4550mAh (51.87Wh) Li-Polymer chemistry restores full charge capacity to this 15-inch ultrabook.
Connector seats flush into the internal slot with a single locking tab on the left side.
We bench tested this cell on a 9500 board — BMS accepted the handshake on first insertion and charged to 100% without throttling.
After installation, run one full discharge to hibernation cutoff then charge uninterrupted to 100% to reset the BIOS battery learn cycle and clear inaccurate health warnings.
Delivery time

This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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Fresh Battery, Worth the Wait

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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By continuing with your purchase, you acknowledge and agree to the estimated 7–10 business day delivery timeframe.
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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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🔹 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.

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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

11.4V

Amp

4550mAh

Dell XPS 15 9500 — 11.4V Li-Polymer Replacement Battery (8FCTC)

This 11.4V, 4550mAh (51.87Wh) Li-Polymer battery replaces the original cell in the Dell XPS 15 9500 ultrabook. It fits the XPS 15-9500-R1845TS, XPS 15-9500-R1505S, and XPS 15-9500-R1845S, among other 9500 variants. OEM part numbers covered include 8FCTC, DVG8M, and P8P1P.

  • XPS 15 9500 platform fit: All XPS 15 9500 variants share the same 11.4V three-cell bus, physical connector pinout, and BMS handshake protocol — that's why one cell covers the full model range rather than each SKU needing its own pack.
  • Bench tested on actual hardware: We ran this cell on the XPS 15 9500 board. The BMS initialised cleanly, Windows reported voltage correctly within two minutes of boot, and charge cycling held within expected tolerance across repeated full-cycle tests.
  • Post-install calibration — XPS 15 9500 specific: After fitting, run the laptop down to hibernate cutoff on battery power, then charge uninterrupted to 100%. 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 the 9500 platform.

BIOS reporting poor battery health immediately after fitting a new cell

The XPS 15 9500 BIOS reads health data from the EEPROM embedded in the battery pack — not from the cell voltage itself. When a new cell is installed, the BIOS compares the new pack's EEPROM data against its stored learn cycle history from the old cell and flags a mismatch as poor health. This is a calibration state, not a fault. Run one full discharge to hibernate cutoff followed by an uninterrupted charge to 100%, and the BIOS learn cycle will rewrite against the new cell's actual characteristics.

Laptop shuts off at 20–30% charge shown on the XPS 15 9500

This happens when the cell hits a voltage cliff under combined CPU and display load before the fuel gauge IC reaches zero. The fuel gauge is still reading a calibrated curve from the old, degraded cell — it doesn't yet know where the new cell's actual low-voltage cutoff sits. The result is an abrupt shutdown that looks like battery failure but is a calibration lag. Run two full discharge-to-hibernate, charge-to-100% cycles, and the fuel gauge IC will map the new cell's discharge curve correctly — shutdowns at false-high percentages will stop.

Compatible Models

XPS 15 9500 XPS 15-9500-R1845TS XPS 15-9500-R1505S XPS 15-9500-R1845S XPS 15-9500-R1945TS

Replaces Part Numbers

8FCTC DVG8M P8P1P

Technical Specifications

Voltage11.4V
Amp Hours4550mAh
Capacity4550mAh
Rate51.87Wh
Net Weight241.2g /8.51 oz
Gross Weight501.2g /17.68 oz
Approximate Weight501.2g /17.68 oz
Dimension 302.70 x 84.30 x 7.75mm

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

My XPS 15 9500 shows the new battery as "0% available (plugged in, not charging)" in Windows — what's happening?

The fuel gauge IC is reading EEPROM data it hasn't yet validated against the new cell, so it reports an invalid state rather than a live reading. This isn't a charging circuit fault. Shut down fully, disconnect the charger for 30 seconds, then boot with the charger connected and let Windows re-enumerate the battery device. If the 0% reading persists past one full charge cycle, run Dell's battery diagnostic from BIOS (F2 at boot → Diagnostics) to confirm the pack is communicating correctly.

Windows says this battery has a different Wh rating than the original — is the cell wrong?

The Wh figure Windows reports pulls from the EEPROM on the pack, and the rated value stored there can differ from what the cell actually delivers under your specific load profile. This cell is rated at 51.87Wh — if Windows shows a slightly different number, that's an EEPROM-reported figure from the replacement pack's firmware, not a sign the wrong cell was fitted. Confirm voltage is reading 11.4V in Dell Power Manager; if voltage matches and the pack charges normally, the cell is correct.

The XPS 15 9500 stopped charging above 80% after I put in the new battery — is the cell defective?

This is almost always a BIOS-controlled charge limit, not a cell fault. Dell's firmware includes a battery care mode that caps charge at 80% to reduce cycle wear — it's enabled in Dell Power Manager under "Battery Settings" and carries over independently of which cell is installed. Open Dell Power Manager, go to Battery, and switch the charge mode from "Primarily AC" or "Custom" to "Adaptive" or "Full Charge." The cap will lift and the cell will charge to 100%.

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