Home » Dell Inspiron 17-3721 Compatible Laptop Adapter 19.5V 3.34A/4.62A 65W/90W (Fixed K1-Tip)
Dell Inspiron 17-3721 Compatible Laptop Adapter 19.5V 3.34A/4.62A 65W/90W (Fixed K1-Tip)
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Dell Inspiron 17-3721 Compatible Laptop Adapter 19.5V 3.34A/4.62A 65W/90W (Fixed K1-Tip)
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Inspiron Series

Dell Inspiron 17-3721 Compatible Laptop Adapter 19.5V 3.34A/4.62A 65W/90W (Fixed K1-Tip)

SKU: AC19V90K1-BP-K209
C$25.00
In stock
Orders placed after 3:00 PM (PT) will be processed on the next business day.

More Compatible Options

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  • Compatible Brands Dell
  • Model/OPN Inspiron 17-3721
  • Model Series Inspiron Series
  • Output Current 3.34A/4.62A
  • Output Voltage 19.5V
  • Input Voltage AC100~240V / 50~60Hz
  • Power 65W/90W
  • Tip Size 7.4*5.0mm
  • Warranty 1 Year
Ships from Canada • Fast local delivery

This replacement laptop adapter for Dell Inspiron 17-3721 is available for C$25.00 . 19.5V · 3.34A/4.62A · 65W/90W · Tip: 7.4*5.0mm.

Important Notes
  • Please make sure the DC output and tip size are compatible before placing the order.
  • For Inspiron 15 3000 series, please must make sure the tip size before placing the order.
Compatible Model
Dell Inspiron 15 (5547) Dell Inspiron 15R-1158MRB Dell Inspiron 17R-2587MRB Dell Inspiron 5421 Dell Inspiron 7420 Dell Inspiron M5030-1719OBK Dell Latitude 5570 Dell Latitude 7280 Dell Latitude D430 Dell Latitude D830N Dell Latitude E5430 Dell Latitude E6410 ATG Dell Latitude PP04X Dell Latitude XT2 XFR Dell Precision M2300 Dell Precision M4400 Dell Precision M6500 Dell Vostro 1088 Dell XPS 15 (L521X)
Original Part Number
Dell 05U092 Dell 0928G4 Dell 09RN2C Dell 0D094H Dell 0NN236 Dell 0WK890 Dell 0Y808G Dell 310-2862 Dell 310-3149 Dell 310-3399 Dell 310-4804 Dell 310-7251 Dell 310-7441 Dell 310-7693 Dell 310-7696 Dell 310-7697 Dell 310-7698 Dell 310-7701 Dell 310-7721 Dell 310-7744 Dell 310-7860 Dell 310-7867 Dell 310-8363 Dell 310-8941 Dell 310-9047 Dell 310-9375 Dell 310-9376 Dell 310-9438 Dell 310-9439 Dell 310-9763 Dell 312-0597 Dell 320-1389 Dell 330-1069 Dell 330-1826 Dell 330-1827 Dell 330-4281 Dell 331-5968 Dell 332-1831 Dell 462-7635 Dell 4H6NV Dell 610-3399 Dell 6TFFF Dell 9RN2C Dell AA22850 Dell ADP-65AH B Dell C2894 Dell CF719 Dell CF820 Dell CM889 Dell D094H Dell DA65NM130 Dell DA65NM131 Dell DA65NM132 Dell DA65NM133 Dell DA65NM136 Dell DA65NM137 Dell DA65NM138 Dell DF263 Dell F7970 Dell FA90PM130 Dell FA90PM132 Dell FA90PM136 Dell FA90PM137 Dell FA90PM138 Dell FA90PM139 Dell FF313 Dell HA65NM130 Dell HA90NM130 Dell HF991 Dell K9TGR Dell LA65NM130 Dell LA65NS0-00 Dell LA65NS2-01 Dell LA90NM130 Dell N2765 Dell N566J Dell N6M8J Dell NF642 Dell NNWP1 Dell ORM617 Dell PA12 Dell PA-12 Dell PA-1650-02DD Dell PA-1650-05D Dell PA-1650-06D3 Dell PA-1900-02D2 Dell PA-1900-28D Dell PA-21 Dell PA-2E Dell TJ76K Dell TR82J Dell U7809 Dell W1451 Dell W916G Dell XD733 Dell XD802 Dell Y596G Dell Y808G Dell YR733 Dell YT886
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.

Safety & Compliance

Certified Quality You Can Trust

Battpit Canada replacement laptop batteries and AC adapters are selected with safety, compatibility, and compliance in mind. Products may meet common industry standards including RoHS, CE, UL, and ULC where applicable.

RoHS
RoHS Compliant Helps reduce restricted hazardous substances in electronic products.
CE
CE Marked Designed to meet applicable safety and quality requirements.
UL
UL Recognized Components Selected products may use UL recognized cells, components, or protection circuits.
ULC
ULC Safety Standard Supports safety confidence for products supplied to Canadian customers.
Why this matters: These compliance marks help customers choose a reliable replacement laptop battery, laptop charger, or AC adapter with built-in safety features such as over-charge, over-current, over-voltage, and short-circuit protection.