Home » Dell LA45NM140 Compatible Laptop Adapter 19.5V 2.31A 45W (Fixed 31-Tip)
Dell LA45NM140 Compatible Laptop Adapter 19.5V 2.31A 45W (Fixed 31-Tip)
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Dell LA45NM140 Compatible Laptop Adapter 19.5V 2.31A 45W (Fixed 31-Tip)
Product image 2

Dell LA45NM140 Compatible Laptop Adapter 19.5V 2.31A 45W (Fixed 31-Tip)

SKU: AC19V40+-+31+TIP-BP-K009
C$23.00
In stock
Orders placed after 3:00 PM (PT) will be processed on the next business day.

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  • Compatible Brands Dell
  • Model/OPN LA45NM140
  • Output Current 2.31A
  • Output Voltage 19.5V
  • Input Voltage AC100-240V / 50-60Hz
  • Power 45W
  • Tip Size 4.5*3.0mm
  • Warranty 1 Year
Ships from Canada • Fast local delivery

This replacement laptop adapter for Dell LA45NM140 is available for C$23.00 . 19.5V · 2.31A · 45W · Tip: 4.5*3.0mm.

Compatible Model
Dell XPS Series XPS 12Dell XPS Series XPS 12 9Q33Dell XPS Series XPS 12 MLKDell XPS Series XPS 12 UltrabookDell XPS Series XPS 13Dell XPS Series XPS 13 (L321x)Dell XPS Series XPS 13 (L322x)Dell XPS Series XPS 13 ClassicDell XPS Series XPS 13 MLKDell XPS Series XPS 13 UltrabookDell XPS Series XPS 13-4040SLVDell XPS Series XPS 13-6928SLVDell XPS Series XPS 13-L321XDell XPS Series XPS 13-L322XDell XPS Series XPS 13RDell XPS Series XPS 13ZDell XPS Series XPS L321XDell XPS Series XPS L322X
Original Part Number
450-18463 RFRWK LA45NM140 FA45NE1-00 DA45NM140 JHJX0 PA-1450-66D1 44PV8 0KXTTW LA45NM121 312-1307 3RG0T LA45NM131 D0KFY 332-1827
How can I confirm a replacement laptop adapter will work with my laptop?
Match the output voltage exactly, then confirm the connector type/size and polarity. Wattage can be the same or higher than your original adapter.
Where do I find the voltage and wattage information?
Check the label on your original charger (or the laptop’s bottom label). Look for Output (V) and Wattage (W). The voltage must match exactly.
Can I use an adapter with a different voltage?
In most cases, no. Using the wrong voltage can cause charging issues or damage your laptop.
Can I use a higher wattage adapter (for example 90W instead of 65W)?
Yes—higher wattage is usually OK as long as the voltage matches and the connector fits. Your laptop will only draw the power it needs.
How do I confirm the connector size is correct?
Compare the tip with your original charger and check the listed connector size (OD × ID). Even small differences (like 5.5×2.1mm vs 5.5×2.5mm) may not fit properly.
What does polarity mean, and why does it matter?
Polarity indicates which part of the plug is positive/negative. It must match your original adapter for safe and reliable charging.
My laptop uses USB-C charging. Can I use any USB-C charger?
Not always. Your laptop may require USB-C Power Delivery (PD) and a minimum wattage (such as 45W/65W/90W). Use a PD charger that meets or exceeds your laptop’s requirement.
Can this adapter be used internationally?
Many adapters support 100–240V input. Check your charger label. If it supports 100–240V, you can use it overseas with the correct plug adapter.
How can I find my laptop model on a Windows laptop?
If you are using a Windows laptop, you can find your laptop model using System Information:

• Step 1: Press Windows + R to open the Run window.
• Step 2: Type msinfo32 and click OK.
• Step 3: In the System Summary section, find System Model in the right pane.

Choosing the correct replacement adapter matters for safety and charging performance. Use this checklist before you place your order:

1. Match the Output Voltage

  • Check your original charger label for Output (for example, 19V).
  • The output voltage should match exactly.

2. Confirm Wattage / Amperage

  • Wattage can be the same or higher than your original adapter.
  • Using higher wattage is usually fine if voltage and connector match.

3. Check Connector Type & Size

  • For barrel tips, match the connector size (OD × ID).
  • For USB-C, ensure it supports USB-C PD and enough wattage for laptops.

4. Verify Polarity

  • Match the polarity symbol shown on your original adapter label.

💡 Battpit tip: Before using any laptop adapter, always check:
• Output voltage (must match exactly)
• Wattage (same or higher is OK)
• Connector size & polarity

All Battpit laptop adapters are designed with advanced built-in safety protection features to ensure reliable and stable charging performance. Our replacement AC adapters help protect your laptop, battery, and internal components during everyday use.

  • Over-voltage protection – Protects your laptop from sudden voltage spikes and unstable power supply.
  • Over-current protection – Prevents excessive current flow to maintain safe and consistent charging.
  • Short-circuit protection – Automatically shuts down the power adapter if a fault is detected.
  • Over-temperature protection – Helps reduce overheating risks for safer long-term use.

Each Battpit replacement laptop charger is engineered to meet high safety and quality standards, providing dependable performance for your notebook computer at home, office, or travel.