The Asus ZenBook 14 UX425 / UX434 47Wh 4-Cell Battery (C41N1904 Original) is a genuine, tested Asus replacement battery available at N.N Laptops, Hafeez Center, Lahore for Rs. 14,799. It's a 47Wh 4-cell internal pack rated at 15.4V and fits ZenBook 14 UX425, ZenBook 14 UX434, ZenBook 13 UX325. Comes with our 30-day check warranty plus Lahore delivery and nationwide.
Why choose the original C41N1904 over generic alternatives?
Generic batteries often use lower-grade cells that degrade faster, lack proper BMS communication, or even cause system warnings. This original Asus C41N1904 is built to the same specification as the pack that shipped with your laptop, ensuring accurate capacity reporting, thermal protection, and full compatibility with battery calibration tools in Windows and macOS. At Rs. 14,799, it's a competitive price in Pakistan for 2026, especially considering the performance you get. We've seen many customers in Lahore, Karachi, Islamabad, and Faisalabad switch from generics back to originals after experiencing swelling or sudden shutdowns. This pack is bench-tested before listing, meaning you're getting a unit that meets our strict quality standards.
Full specifications
| Brand | Asus |
|---|---|
| Capacity | 47Wh |
| Voltage | 15.4V |
| Cell Configuration | 4-cell internal |
| Chemistry | Li-Polymer / Li-Ion (matched to OEM spec) |
| Compatible Models | ZenBook 14 UX425, ZenBook 14 UX434, ZenBook 13 UX325, ExpertBook B9, ZenBook Flip 14 |
| Cycle Life (Rated) | 400-600 full cycles |
| Condition | Genuine — Tested |
| Warranty | 30-day check warranty |
Compatibility — which laptops does this battery fit?
This 47Wh 4-cell internal battery is a direct OEM replacement for the following Asus laptops:
- ZenBook 14 UX425
- ZenBook 14 UX434
- ZenBook 13 UX325
- ExpertBook B9
- ZenBook Flip 14
Match the OEM part number on the sticker of your current battery before ordering. If your old battery part number isn't on this list but the laptop is, message us — there are often three or four interchangeable part numbers per chassis. For example, some UX425 variants use C41N1904, while others might use C41N1905. We can cross-check via WhatsApp 0314 4000131 with your laptop's serial number.
Battery health — what we test before shipping
Every battery on our shelf goes through a 5-point test before listing:
- Capacity — we measure actual usable Wh and only ship packs at 95%+ of rated capacity.
- Cycle count — read from the embedded BMS chip; we don't sell anything over 100 cycles.
- Cell balance — all 4-cell internal cells within 50mV of each other.
- Charge/discharge cycle — verified full cycle without thermal anomaly.
- Visual — no swelling, no bulging, no scorched contacts.
Our bench-testing goes beyond a simple power-on check. We use a professional battery analyzer to simulate real-world discharge, ensuring the pack delivers consistent voltage across all four cells. This is why we confidently offer a 30-day check warranty — if the battery doesn't perform as expected, bring it back to our shop at Hafeez Center, Gulberg III, Lahore.
Installation — how to swap the battery
Internal 4-cell batteries on modern Asus laptops require opening the back panel (8-12 Phillips screws, sometimes Torx T5). Disconnect the AC adapter, unscrew the panel, locate the battery connector on the board, gently lift the ribbon connector latch, unscrew the battery hold-down screws, lift out the old pack, and reverse the steps with the new one. Total time: 10-15 minutes.
Pro tip: Before disconnecting the old battery, discharge the laptop to below 25% to minimize risk. Also, use a plastic spudger to gently pry the connector — metal tools can short pins. If you're in Lahore, we'll do it for free. If you're in Karachi, Islamabad, Rawalpindi, or Multan, our step-by-step video guide is available on request via WhatsApp 0314 4000131.
Free installation in shop
If you're in Lahore, bring the laptop to Hafeez Center — installation is free with battery purchase. We'll also calibrate the new pack (full charge → full discharge → full charge) so Windows / macOS reads the correct capacity from day one.
Real-world battery life — what to expect
With this 47Wh pack and balanced Windows / macOS settings (70% brightness, Wi-Fi on, mixed use), expect:
- Web + Office work: 5-7 hours
- Video playback: 6-8 hours
- Code compilation / Photoshop: 2-3 hours
- Gaming or heavy GPU load: 60-90 minutes
These figures match Apple / Dell / HP / Lenovo published specs for the listed models. If your old battery was giving you 2 hours, the new one will restore the original full runtime. In typical Pakistani use — with frequent power cuts and mobile data tethering — you can still expect 4-5 hours of reliable work. Compared to a new 48Wh battery, this 47Wh pack offers nearly identical runtime at a lower price point.
Where to buy in Lahore — and warranty terms
Visit us at Shop 66A, 3rd Floor, Hafeez Center, Gulberg III, Lahore. We test the new pack on your laptop before you buy — if Windows / macOS reads the correct cycle count and design capacity, you walk out happy. Lahore deliveries are free; nationwide via TCS / Leopards covers Karachi, Islamabad, Faisalabad, Multan, Peshawar, and Sialkot in 1-3 working days. WhatsApp 0314 4000131 to confirm stock, request live photos of the actual unit, or ask any compatibility questions. Our shop has been serving customers at nnlaptops.com for years, and we pride ourselves on honest pricing — no hidden fees.
Browse all our laptop batteries, laptop chargers, complete laptop parts catalogue.
Warranty — what you're protected against
Every battery carries our 30-day check warranty. If the pack fails to charge, shows wrong capacity in Windows / macOS, drops below 85% of rated Wh in our diagnostic, or develops any swelling within 30 days, bring it back to the shop with the invoice for full replacement or refund. No questions asked within the warranty window. For customers outside Lahore, we offer a hassle-free replacement process: simply ship the battery back to us via TCS (we cover return shipping if it's a genuine defect), and we'll dispatch a replacement within 24 hours.
Frequently asked questions
Will the laptop recognise this battery in Windows / macOS?
Yes — every battery we sell is BMS-flashed with the correct cell-pack ID for the laptop, so Windows / Lenovo Vantage / Dell Power Manager / macOS Battery Health show full information including cycle count and design capacity. No 'plugged in, not charging' driver errors.
How much battery backup will I get on my ZenBook 14 UX425?
With this 47Wh pack at default Windows balanced settings, expect 5-7 hours of mixed-use battery life (web, Office, video). Brightness at 70%, Wi-Fi on, no heavy GPU workload. Gaming or compiling drains in 90-120 minutes — that's normal for any laptop battery this size.
Do I need to take the laptop apart to install the 4-cell battery?
Internal batteries need the back panel removed — typically 8-12 Phillips screws, then disconnect the old battery cable, swap, and reseat. We do free in-shop installation in Lahore if you bring the laptop. Removable 6-cell / 9-cell batteries on older laptops just slide in/out with a latch — no tools needed.
How long will the new battery last?
A fresh quality cell-pack should give you 400-600 full charge cycles (about 2-3 years of daily use) before noticeable capacity drop. Avoid leaving the laptop plugged in at 100% all day — keep it cycling between 40% and 85% for longest cell life.
Can I use this battery while the laptop is plugged in?
Yes, the battery management system handles pass-through charging seamlessly. However, if you're always plugged in, we recommend setting a charge limit (e.g., 80%) in the MyAsus app to prolong battery health.
Why buy from N.N Laptops?
We're not a faceless online store — we're a physical shop in Hafeez Center, Lahore, with a reputation for quality. Every battery is bench-tested, packed carefully, and shipped with tracking. Our prices are fixed and transparent: Rs. 14,799 for this Asus ZenBook 14 UX425 / UX434 47Wh 4-Cell Battery (C41N1904 Original). If you find a lower price on a genuine, tested pack elsewhere in Pakistan, let us know — we'll match it. Contact Sayam on WhatsApp 0314 4000131 for quick service.
N.N Laptops — Shop 66A, 3rd Floor, Hafeez Center, Gulberg III, Lahore. WhatsApp / Call 0314 4000131. Lahore delivery, nationwide delivery via TCS / Leopards, 30-day check warranty. Visit nnlaptops.com for our full range.
