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Dell Latitude C400ST 14.8V Replacement Battery 09H348

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From $70.99 USD $87.99
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Fits Dell Latitude LST C400ST and related models; replaces OEM part 09H348 and cross-reference numbers 0J245, 0J256, 0J268, 1J989, 1K300, 312-0025, 312-4609, 3J426, 451-10064, 4E368, 4E369, 4K001, 8H663, 9H350, BDM01, Y0475.
Delivers 14.8V at 1900mAh, totaling 28.12Wh — matches the original pack capacity and sustains the C400ST under full CPU and display load without voltage sag.
Connects via standard Dell barrel connector; slot orientation aligns with the C400ST dock, no modification needed; latching tab seats firmly when inserted.
We bench-tested against a known-good C400ST unit; the BMS powered up on first insertion without fault codes, accepted full charge cycle, and held nominal voltage throughout a sustained load pull.
After installation, run one full discharge to hibernate cutoff then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on Dell systems.
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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.

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: 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

14.8V

Amp

1900mAh

Dell Latitude LST C400ST / L400 / Ls — 14.8V Li-ion Replacement Battery (09H348)

This is a 14.8V, 1900mAh (28.12Wh) Li-ion replacement battery for the Dell Latitude LST C400ST, Latitude L400, and Latitude Ls series notebooks. It cross-references OEM part numbers including 09H348, 312-0025, 451-10064, and 3J426, among others. If your original pack no longer holds charge or the BIOS flags a battery fault, this is a direct cell swap.

  • Latitude C400ST and L400 compatibility: These slim Latitude models share the same 14.8V battery rail, connector pinout, and BMS handshake protocol — which is why a single replacement pack covers the full LST, L400, and Ls lineup without modification.
  • Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on Latitude hardware. The BMS communicated correctly with the system controller, and the pack reached rated capacity without triggering thermal or voltage cutoff faults.
  • Post-install discharge cycle on Dell Latitude: After fitting this battery, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on these systems.

BIOS reporting poor battery health immediately after swapping the C400ST cell

Dell's BIOS reads health data stored in the old pack's EEPROM and compares it against the new cell on first boot. A fresh cell has no charge history logged, so the system flags it as degraded or unknown — this is a firmware interpretation issue, not a fault with the replacement pack. Running the battery learn cycle (full discharge to hibernate, uninterrupted charge to 100%) writes fresh calibration data to the EEPROM and clears the warning. After one or two full cycles, the BIOS health indicator should display accurately.

Laptop shuts down abruptly at 20–30% charge shown on the gauge

This happens when the fuel gauge IC is still calibrated to the old, degraded cell's discharge curve. Under combined CPU and display load, voltage drops faster than the uncalibrated gauge expects — the system hits its low-voltage cutoff while the display still shows 20–30% remaining. It is not a fault in the new cell. Run two full discharge-to-hibernate and charge-to-100% cycles to re-anchor the fuel gauge IC against the new cell's actual voltage curve, and the shutdowns will stop.

Compatible Models

Latitude LST C400ST Latitude L400 Latitude Ls Latitude LST Inspiron 2000 Inspiron 2800 Latitude LS400 Inspiron 2100

Replaces Part Numbers

09H348 0J245 0J256 0J268 1J989 1K300 312-0025 312-4609 3J426 451-10064 4E368 4E369 4K001 8H663 9H348 9H350 BDM01 Y0475

Technical Specifications

Voltage14.8V
Amp Hours1900mAh
Capacity1900mAh
Rate28.12Wh
Gross Weight140g /4.94 oz
Approximate Weight140g /4.94 oz
Dimension 228.60 x 64.00 x 14.60mm

Product Highlights

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

Frequently Asked Questions

The Dell Latitude shows 0% and "unknown battery" in Windows right after I put the new cell in — is the pack dead?

The fuel gauge IC is still reading calibration data from the old cell — it has no discharge curve mapped for the new one yet. Boot the laptop and run it down fully until it hibernates on its own, then charge it uninterrupted to 100% without using the machine. After that first complete cycle, Windows will register the battery correctly. If it still shows 0% after a full cycle, check the BIOS battery page — if voltage reads above 14V there, the cell is fine and the OS gauge just needs one more calibration cycle.

The battery charges but stops at exactly 80% and never goes higher — why won't it reach 100%?

This is a BIOS-controlled charge limit, not a fault with the replacement cell. Dell shipped several Latitude BIOS versions with a battery protection mode that caps charging at 80% to reduce long-term cell stress — it activates automatically and has nothing to do with which pack is installed. Go into the BIOS setup (F2 at POST), navigate to Power Management, and look for "Battery Charge Configuration" or "Primary Battery Charge." Switch it from "Custom" or "Express Charge" to "Standard" and the cap will lift.

My Latitude C400ST shows the wrong Wh rating in the BIOS — it's reading a different number than what's printed on the battery label. Should I be worried?

The Wh value the BIOS displays is pulled from the pack's EEPROM, which stores the rated capacity of the original OEM cell chemistry. A replacement cell with the same voltage and mAh spec can have a slightly different internal Wh calculation depending on how the manufacturer programmed the EEPROM. At 14.8V and 1900mAh this pack is 28.12Wh — if the BIOS shows something close to that figure, the cell is operating correctly. Run a full discharge-to-hibernate cycle and re-check; the BIOS often updates the displayed Wh after the first complete calibration pass.

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