Bulk Quantity Pricing
Quantity 10+ 50+ 100+
Price S$36.00 S$34.00 S$32.00

Replacement Laptop Battery for Dell 5421 Compatible with Inspiron 14(3421), 14R(5421), 15(3521), 15R(5521), 17(3721), 17R(5721), Vostro 2421

List price: S$120.00
You save: S$57.51 (48%)
In stock
Bulk Quantity Pricing
Quantity 10+ 50+ 100+
Price S$36.00 S$34.00 S$32.00


Product details:-

  • 100% brand new from factory and high quality.
  • Economical Price
  • Sold and shipped from Singapore (hence faster delivery, Easy to exchange)
  • Fast, friendly and hassle-free customer service with a full 6 months warranty.
  • Our batteries are 100% brand new, CE / FCC / ROHS-certified for safety and environmentally friendly. We only use high-quality grade A cells for higher performance, longer life, & more reliability. It meets and/or exceeds OEM specifications.
  • Capacity: 4400mAh
  • Voltage: 11.1V
  • Battery Cells: 6 Cells
  • Compatible models: Dell Inspiron 14(3421), 14R(5421), 15(3521), 15R(5521), 17(3721), 17R(5721), Vostro 2421

    Dell Inspiron 17R 5721 Battery
    Dell Laptop Battery
    Replacement Laptop Battery


Warranty & Support

6 Months


Excellent service. The original battery was delivered. The packing was so good. The product is worth the price. I am satisfied with the product....
I ordered this when my original 3-year-old Dell laptop battery wasn't working. It's a replacement battery but as my older original battery. works well. I got it with 6 months warranty. No worries, I'm so happy.
Write a review



Helena Lee 0 Comment 13/04/2019
Is this Suitable with Dell Inspiron 14R(5421) laptop?
ElectronicsCrazy.sg 0 13/04/2019
Yes same battery is suitable with your laptop model please proceed for your order.
Shain Hoo 0 Comment 20/04/2019
Is this Battery Suitable with Dell Vostro 2421 laptop?
ElectronicsCrazy.sg 0 20/04/2019
Yes same battery is suitable with your laptop model please proceed for your order.
  • Ninja Van Delivery (1-3 days) for S$6.99 only
  • SingPost Registered delivery (3-4 days) for S$2.99 only
  • SingPost Local Ordinary Mail (8-10 days) for S$1.49 only
  • Self Pickup: FREE

You will have to collect your parcel from a Collection Point.

  • Warranty

So, you are here it means your laptop battery has started showing the deadly signs, worry not! This replacement laptop battery will solve your lifelong problems. Dell is a known brand, so deserves a proper treatment, so don’t buy any poor-quality batteries as the health of your laptop resides in the battery. This replacement battery is suitable for Inspiron 14(3421), 14R(5421), 15(3521), 15R(5521), 17(3721), 17R(5721), Vostro 2421.

Make sure this replacement battery is compatible with a laptop using an 11.1V battery ONLY, so make sure you have carefully read the specifications of your old battery.

Buy replacement Battery for Dell from Singapore

Want to replace that dead or dying battery? Is your battery dying too quickly? Is your battery lacks charging? Replacing it may help!

To get this Dell-only replacement battery in Singapore, you just have to wait for a few hours. Yes, drop this in your cart before 3 pm and let us drive the battery to your doorstep.

This economically priced battery including all the batteries you find here is 100% original and certified by CE / FCC / ROHS, that’s why we call them safe and environmentally friendly. To boost your performance and improves the life of your precious laptops, we only use high-quality grade A cells. All our batteries are manufactured in a way to meet and/or exceed OEM specifications.

Product Details

This 4400mAh replacement laptop battery contains 6 Li-Ion or Li-Poly cells, with a powering capacity of 11.1V. This 100% newly-manufactured can be charged up to 500 charging cycles during its lifetime. This is the class A cells that provide faster loads and low power consumption while its chip protection capacity offers security and stability.

All the cells of this laptop battery are new and tested rigorously against the set standards to ensure it meets our specifications; make sure we are not involved in any shady business of modifying the battery’s capacity or cycle count to make it look better or for any other reason/s.

These aftermarket replacement batteries lead the industry both in quality and reliability, and we make sure that you're getting the best part of what your hard-earned bucks can buy.

We’ve Got Your Back - all the batteries you will buy from electronicscrazy.sg will be backed by a 6-month warranty. Though we spend hours making sure we provide the best batteries, uncompromising on safety and performance.

But still, if you find any (even slightest) fault in our battery, send us a query via using our 24 x 7 email support, or simply click ‘need help’ popup being shown on the right end of your screen.

Tips to extend the life of your new batteries

Please recharge or change the laptop battery only when the battery power is low and try to use Li-Ion battery for your Dell Laptop that works longer than Non-Li-Lon one.

It is better to defragment regularly for your Dell Inspiration battery life. And, to reduce the laptop power consumption, use some hard drive and optical drive spin-down on your laptop. Not using your battery, leave in a dry and cool condition.