Dell Latitude 3340 Compatible Battery 11.1V 5800mAh YFDF9
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Dell Latitude 3340 Compatible Battery 11.1V 5800mAh YFDF9 - 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 Latitude 3340 Compatible Battery 11.1V 5800mAh YFDF9 - is backordered and will ship as soon as it is back in stock.
Voltage
11.1V
Amp
5800mAh
Dell Latitude 3340 / 3350 — 11.1V Li-ion Replacement Battery (YFDF9)
This 11.1V 5800mAh Li-ion battery replaces the original cell in the Dell Latitude 3340, Latitude 3350, and Latitude 13 Education series. It covers OEM part numbers YFDF9, VDYR8, HGJW8, 451-BBJB, and related variants. Capacity is 64.38Wh — matching the factory specification for these ultrabook-class notebooks.
- Latitude 3340 / 3350 / 13 Education platform fit: These models share the same 11.1V three-cell architecture, connector pinout, and BMS handshake protocol. One cell covers all listed variants without any hardware modification.
- Bench tested on actual hardware: We ran this cell through a full charge and discharge cycle on a Latitude 3340. The BMS communicated correctly with the EC, charge current ramped as expected, and the cell reached 100% without triggering a fault or cutoff event.
- BIOS learn cycle after installation: After fitting this cell, run one complete 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 notebooks.
BIOS reporting poor battery health immediately after replacement
Dell's EC reads health data from the battery's EEPROM on first contact. When a new cell arrives, its EEPROM does not yet hold cycle history matched to this machine, so the BIOS flags the battery as degraded or unknown. This is a data mismatch, not a hardware fault. Running one full discharge-to-hibernate then a full uninterrupted charge writes fresh cycle data and clears the warning. After two to three cycles, the health status in Dell Power Manager will update to normal.
Laptop shutting down at 20–30% charge shown on screen
This symptom appears when the fuel gauge IC has not yet calibrated against the new cell's actual voltage curve. The IC is still using discharge curves from the old, degraded cell, so it miscalculates the voltage cliff and triggers shutdown early. The fix is straightforward: discharge the laptop fully to hibernate-cutoff twice in succession, charging to 100% between each cycle. After calibration, the OS gauge will track the true cell voltage and shutdowns at false-low percentages will stop. Target a full charge endpoint of 12.6V across the pack.
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
Dell Power Manager shows the wrong Wh rating after I installed the replacement — it says 48Wh instead of 64Wh. Is the cell wrong?
The Wh figure displayed in Dell Power Manager and Device Manager pulls from the battery EEPROM, not a live measurement. A new cell's EEPROM reports its rated chemistry baseline until the fuel gauge IC recalibrates against actual charge cycles. Run two full discharge-to-hibernate and recharge cycles, then check again — the reported Wh value will update to reflect the real 64.38Wh capacity of this cell.
The battery charges to 80% and stops — the charging indicator goes solid and Dell says it's full, but it clearly isn't.
Dell BIOS on Latitude notebooks includes a firmware-controlled charge limit called Primarily AC mode or Custom Charge. When enabled, it caps charging at 80% to reduce cell wear during long periods on mains power. This is a BIOS setting, not a fault with the replacement cell. Go to BIOS setup (F2 at POST) → Power Management → Battery Charge Configuration and switch from Custom to Standard to restore full 100% charging.
After the swap, the battery percentage jumps around — it shows 60%, then drops to 41% a few seconds later without the load changing.
The fuel gauge IC on the Latitude mainboard stores a discharge model built around the old cell's internal resistance and voltage curve. With a new cell installed, those stored parameters no longer match reality, so the gauge interpolates incorrectly and the percentage reading swings erratically. This settles after two to three full calibration cycles — full discharge to hibernate-cutoff, then a full uninterrupted charge each time. After the third cycle, the IC's model will align with the new cell and the percentage readout will stabilise.
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