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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 B31N1912 Replacement Laptop Battery, 3600mAh 3-Cell Li-ion, 11.55V, 41.58Wh, Black

ASUS B31N1912 Replacement Laptop Battery, 3600mAh 3-Cell Li-ion, 11.55V, 41.58Wh, Black
ASUS B31N1912 Replacement Laptop Battery, 3600mAh 3-Cell Li-ion, 11.55V, 41.58Wh, Black
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R687
Working on your ASUS VivoBook 15 or X512 series laptop and suddenly losing power can disrupt your flow. This Extra Digital Advanced replacement battery breathes new life into your device, providing the same voltage and capacity as the original B31N1912 part. Whether you're finishing a report at a ca... Read More
Out Of Stock
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Stock Out Of Stock Code 3309316 Brand EXTRA DIGITAL Model NB431816 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

Working on your ASUS VivoBook 15 or X512 series laptop and suddenly losing power can disrupt your flow. This Extra Digital Advanced replacement battery breathes new life into your device, providing the same voltage and capacity as the original B31N1912 part. Whether you're finishing a report at a café or streaming videos on the couch, this battery keeps you unplugged and productive.

Key specifications

  • Battery type: Lithium-ion (Li-ion)
  • Capacity: 3600 mAh
  • Energy: 41.58 Wh
  • Voltage: 11.55 V
  • Number of cells: 3
  • Colour: Black
  • Condition: New
  • Compatible with ASUS part number: B31N1912
  • Compatible laptop series: ASUS VivoBook 15, VivoBook S15, X512 series (X512DA, X512DK, X512FA, X512FB, X512FL, X512JA, X512JF, X512JP, X512UA, X512UB, X512UF)
  • Protection: Overcharge, over-discharge, over-current, short-circuit
  • Certifications: CE, RoHS
  • Warranty: 12 months
  • Rechargeable: Yes

Why choose it

This battery is engineered to match or exceed the original specifications, providing dependable runtime for everyday computing. The integrated safety circuitry prevents damage from common electrical faults, extending the lifespan of both the battery and your laptop. With CE and RoHS certifications, it meets strict European standards for safety and environmental responsibility. A 12-month warranty gives you peace of mind, and the black finish blends seamlessly with your laptop.

Ideal use cases

  • Replacing a worn-out original battery in ASUS VivoBook 15 or X512 series laptops
  • Extending mobile productivity for students, professionals, and travelers
  • Restoring full battery capacity for uninterrupted work or entertainment

Good to know

The battery uses high-performance Li-ion cells and includes comprehensive protection against overcharge, over-discharge, over-current, and short circuits, ensuring safe and reliable operation through hundreds of charge cycles. It is a direct fit for the original B31N1912 part, so installation is straightforward. Always follow manufacturer guidelines for battery handling and disposal.

Specifications
AC (power) in
No
Bluetooth
No
Brand
EXTRA DIGITAL
Built-in microphone
No
Cables included
No
Card reader integrated
No
Category
Laptop Battery
Country of origin
China
DC-in jack
No
EAN
9990000431816
Manual
No
Microphone in
No
Model
NB431816
MPN
NB431816
Near Field Communication (NFC)
No
On/off switch
No
Product colour
Black
Product type
Laptop Battery
Recommended usage
Laptop
Type
Battery
USB ports quantity
0
Warranty period
12 months
Wi-Fi
No
Price history over the last 6 months
ASUS B31N1912 Replacement Laptop Battery, 3600mAh 3-Cell Li-ion, 11.55V, 41.58Wh, Black
Current
R687
Lowest
R671
Highest
R687
Change 24H
+R10   +1%
Week
+R16   +2%
Month
—   

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