Follow this professional, photo-assisted guide to safely replace the battery in your Dell Vostro 16 5640 (model P131F / P131F001) with the Dell V6W33 54Wh pack. We’ll start with prep and Service Mode, then remove the base cover, swap the battery, and complete post-install checks.
Buy the Correct Battery
Official replacement for Vostro 16 5640 (P131F / P131F001): Dell V6W33 54Wh.
Before working inside your computer
- Save and close all open files and exit all applications.
- Shut down Windows: Start > Power > Shut down. (If using another OS, follow its shutdown method.)
- Disconnect the AC adapter and unplug the computer from the wall outlet.
- Disconnect all peripherals and network cables.
- Remove any memory cards and optical media (if present).
- If possible, enter Service Mode to electronically cut off battery power before opening the chassis.
Enter Service Mode (power cut-off)
Service Mode cuts power without physically unplugging the battery cable—ideal before repairs.
CAUTION: If you cannot turn on the computer to enter Service Mode, or your unit does not support it, proceed to disconnect the battery cable during the removal step.
- Ensure the laptop is shut down and the AC adapter is disconnected.
- Hold the B key and press the power button for ~3 seconds until the Dell logo appears.
- Press any key to continue.
- If prompted to remove the AC adapter, do so, then press any key to proceed.
- When the “ready to proceed” message appears, press any key. The system emits three short beeps and shuts down.
- Once shut down, the system is in Service Mode. If you cannot enter Service Mode, skip this and continue with physical disconnection in the battery step.
Tools and preparation
| Item | Notes |
|---|---|
| Phillips screwdriver | Suitable for M2 screws; keep screws organized |
| Plastic pry tool / scribe | Avoid metal tools to protect clips and finish |
| ESD protection | Wrist strap or frequent grounding to avoid static |
| Clean workspace | Good lighting; a parts tray for screws |
With the system off, you may press and hold the power button for 10–15 seconds to discharge residual power before opening.
Step 1 — Remove the base cover
- Remove the six (M2×5.5) screws and loosen the two captive screws securing the base cover.
- Using a plastic scribe, start at the U-shaped recesses near the hinges and gently pry open the top edge.
- Continue along the left and right edges to release the remaining clips.
- Lift and remove the base cover off the palm-rest and keyboard assembly.
Step 2 — Remove and replace the battery
CAUTION: The following steps are intended for trained technicians. Proceed carefully; if unsure, consult a professional.
- Disconnect the battery cable from the BATT connector on the system board.
- Remove the five (M2×3.5) screws securing the battery.
- Lift the battery (with its cable) out of the chassis.
- Place the new Dell V6W33 54Wh battery, align mounting points, and reinstall the five M2×3.5 screws.
- Reconnect the battery cable firmly to the BATT connector.
- Reinstall the base cover in reverse order and tighten all screws evenly.
Post-installation checks
- Reconnect the AC adapter and power on the laptop.
- Verify that the battery is detected and charging in Windows.
- Perform one calibration cycle for accurate estimates: charge to 100% → use to ~10–15% → recharge to 100%.
- Optional: run
powercfg /batteryreportto confirm the new capacity values.
Ready to install?
Get the V6W33 54Wh battery for your Vostro 16 5640 and follow the steps above.