Home » Dell HK421 Compatible Laptop Battery 11.1V (6600mAh / 73Wh) Li-ion
Dell HK421 Compatible Laptop Battery 11.1V (6600mAh / 73Wh) Li-ion
Product image 1
Dell HK421 Compatible Laptop Battery 11.1V (6600mAh / 73Wh) Li-ion
Product image 1

Dell HK421 Compatible Laptop Battery 11.1V (6600mAh / 73Wh) Li-ion

SKU: LDE203X-BP-K005
C$51.50
In stock
Orders placed after 3:00 PM (PT) will be processed on the next business day.

More Compatible Options

→ Shop all Dell laptop adapters → Shop all Dell laptop batteries
  • Compatible Brands Dell
  • Model/OPN HK421
  • Cell Type Conventional Li-ion
  • Capacity 6600mAh / 73Wh
  • Output Voltage 11.1V
  • Warranty 1 Year
Ships from Canada • Fast local delivery

This compatible replacement laptop battery for Dell HK421 is available for C$51.50 . 11.1V · 6600mAh / 73Wh · Conventional Li-ion.

Compatible Model
Dell Vostro Series Vostro 1000Dell Vostro Series Vostro 1000 SeriesDell Latitude Series Latitude 131L Dell Inspiron Series Inspiron 1501Dell Inspiron Series Inspiron 1505Dell Inspiron Series Inspiron 6400Dell Inspiron Series Inspiron E1501Dell Inspiron Series Inspiron E1505Dell Inspiron Series Inspiron PP20L
Original Part Number
HK421 451-10424 0RD857 0UD267 0TD349 0UD260 TM777 451-10339 RD859 312-0427 UD260 PR002 312-0461 RD850 UD267 UY628 0UD264 HJ588 PD946 XU937 TX280 312-0460 GD761 0PD945 312-0600 TD344 TM787 XU863 TD349 KD476 0CR174 CR174 0RD850 HJ607 0UD265 TD347 XU882 312-0466 JN149 451-10338 0RD859 0PD946 UD264 PD945 312-0599 MJ365 0TD344 0PD942 0GD761 312-0457 RD855 451-10482 312-0467 TM795 UD265 0TD347 312-0428 PY961 NR147 PD942 RD857
How can I confirm a replacement laptop battery will fit?
The best way is to match the part number printed on your current battery. Then verify the voltage, and compare the battery shape plus connector location with the product photos and specs.
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.

This model information helps ensure you select the correct replacement battery.
Where do I find the battery part number?
Power off the laptop, unplug the charger, and remove the battery if it’s removable. The part number is printed on the label on the battery itself—use that to confirm compatibility.
Can I use a battery with a different voltage?
In most cases, no—battery voltage should match the original. Some labels are equivalent (10.8V = 11.1V, and 14.4V = 14.8V), but other voltage differences are not compatible.
What should I check before buying a replacement online?
Start with the original battery part number and voltage. After that, compare size and shape, connector type and position, latch/clip placement, and orientation using product photos and details.
Can I search by laptop model instead of battery part number?
The laptop model helps narrow results, but the battery part number is more accurate. One laptop model can use multiple battery versions, so matching the printed part number is recommended.
Any quick tips to improve laptop battery runtime?
Turn on Power Saver/Battery Saver, lower screen brightness, close unused apps and tabs, disable Wi-Fi/Bluetooth when you don’t need them, and keep vents clear to reduce heat.

Picking the correct replacement battery (and adapter, if needed) matters for safety and performance. Battpit stocks a wide range of compatible part numbers and models across major laptop brands. Use the checklist below before you place your order:

1. Identify Your Laptop Model

  • Check the label on the bottom of the laptop or your system information for the exact model.
  • If you’re purchasing an adapter, verify the input requirements shown on your laptop label (voltage/current).

2. Match the Battery Part Number

Always shut down the laptop before removing the battery. The part number printed on the battery label is the most reliable way to confirm the correct replacement.

3. Common Part Number Examples

Brands often use predictable formats. Here are a few examples to help you recognize them:

HP / Compaq:
123456-001
Sony:
PCGA-BP12, VGP-BP1
Dell:
312-1234, 1234P
IBM / Lenovo:
02K1234, 08K1234
Toshiba:
PA1234U-1BRS

4. Compare the Physical Fit

Double-check the overall shape, connector type and connector position, plus the latch/lock location and orientation. Compare these with product photos before ordering.

5. Voltage Notes

Some laptops have multiple battery options with different voltages (for example, 11.1V vs 14.8V). These are not interchangeable. Always match the voltage printed on your original battery.

  • Li-ion 10.8V is equivalent to 11.1V.
  • Li-ion 14.4V is equivalent to 14.8V.

Example Labels

Example battery label showing part number and voltage
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.