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Before you believe a bad review about us

We would like to respond openly to every negative review about us. Many are posted anonymously, so we cannot reach those customers directly. This open letter is our reply, and we would be grateful if you took a moment to read it.

But here is what a one-star review will never tell you:

  • We import from 70+ official distributors. That is why you pay far less than local retail — and why delivery takes longer. We publish the date before you pay, never after.
  • You can pay only when your goods land in Johannesburg. Pay on Arrival, no full payment up front. Ask yourself what scammer offers that.
  • Nobody has ever lost money with us. You get the product, or you get a refund. There is no third option, and there never has been.
  • We are part of the ITwork group — ten years trading in Europe, nine stores, thousands of positive reviews.
  • Johannesburg and Cape Town stores open this year — real shelves, real stock, walk in and buy the same day.

We are not satisfied with our review scores, and we are not going to fix them by hiding anything. We are fixing them by being faster, clearer and easier to reach than any reason to complain.

Read the full letter — photos and video of real shipments, and a straight answer to every accusation.

Problem with an order right now? Write to [email protected], [email protected] or [email protected] — answered the same business day. The letter also lists our group and store owners' contacts.
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ASUS C31N1821 4210mAh Li-Polymer Laptop Battery for ZenBook 13/14/15 UX333 UX433 UX533 Series - Black

ASUS C31N1821 4210mAh Li-Polymer Laptop Battery for ZenBook 13/14/15 UX333 UX433 UX533 Series - Black
ASUS C31N1821 4210mAh Li-Polymer Laptop Battery for ZenBook 13/14/15 UX333 UX433 UX533 Series - Black
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R1,109
This Extra Digital Advanced replacement battery breathes new life into your ASUS ZenBook, matching the original C31N1821 pack in fit, voltage, and communication. Unlike generic cells that often report inaccurate charge levels, this 3-cell Li-Polymer unit delivers a true 4210mAh capacity and 48.63Wh ... Read More
Out Of Stock
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Stock Out Of Stock Code 3308519 Brand EXTRA DIGITAL Model NB432578 Warranty 2 Years

Shipping & Returns

Estimated delivery Wednesday, September 30
You will be kept updated through our detailed tracking system
Payment options
EFTPayFastBank CardSnapScanZapperGoogle PayApple PayMobicredMoreTymePay on Arrival

This Extra Digital Advanced replacement battery breathes new life into your ASUS ZenBook, matching the original C31N1821 pack in fit, voltage, and communication. Unlike generic cells that often report inaccurate charge levels, this 3-cell Li-Polymer unit delivers a true 4210mAh capacity and 48.63Wh energy, so you can work unplugged with confidence.

Highlights

  • Direct replacement for ASUS part numbers C31N1821, 0B200-03290000, and 0B200-03290100
  • 11.55V nominal voltage and 4210mAh capacity for reliable runtime
  • Integrated overcharge, over-discharge, overheat, and short-circuit protection
  • CE, FCC, and RoHS certified for safety and environmental compliance
  • Internal installation – designed to fit perfectly inside compatible ZenBook models

In daily use

Once installed, the battery behaves exactly like the original: the laptop reads the exact charge percentage, and the protection circuits prevent damage from power surges or extreme temperatures. You can leave the laptop plugged in overnight without worrying about overcharging, and the Li-Polymer chemistry retains capacity over hundreds of cycles.

Full specifications

  • Battery type: Li-Polymer
  • Voltage: 11.55V
  • Capacity: 4210mAh / 48.63Wh
  • Number of cells: 3
  • Colour: Black
  • Condition: New
  • Compatible ASUS series: ZenBook 13 UX333FA, UX333FN, UX333FL; ZenBook 14 UX433FA, UX433FN, UX433FL; ZenBook 15 UX533FD, UX533FT; ZenBook 14 UX534FT; VivoBook U3300F, U4300F, U5300F series
  • Protection: Overcharge, over-discharge, overheat, short-circuit
  • Certifications: CE, FCC

Final note

Restore your ZenBook's portability with a battery that matches the original in every way—fit, performance, and safety.

Specifications
AC (power) in
No
Bluetooth
No
Brand
ASUS
Built-in microphone
No
Cables included
No
Card reader integrated
No
Category
Laptop Battery
Country of origin
China
DC-in jack
No
EAN
9990000432578
Manual
Yes
Microphone in
No
Model
NB432578
MPN
C31N1821
Near Field Communication (NFC)
No
On/off switch
No
Package type
Box
Power consumption (standby)
0 W
Product colour
Black
Product type
Battery
Recommended usage
Laptop
Type
Laptop Battery
USB ports quantity
0
Warranty period
1 year
Wi-Fi
No
Price history over the last 6 months
ASUS C31N1821 4210mAh Li-Polymer Laptop Battery for ZenBook 13/14/15 UX333 UX433 UX533 Series - Black
Current
R1,109
Lowest
R1,084
Highest
R1,109
Change 24H
+R15   +1%
Week
+R25   +2%
Month
—   

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