Asus TUF Gaming F15 / F17 48Wh 3-Cell Battery (B31N1822 Original)

Reliable power for your Asus TUF Gaming laptop — genuine tested replacement

If your TUF Gaming F15 or F17 is struggling to hold a charge, the Asus TUF Gaming F15 / F17 48Wh 3-Cell Battery (B31N1822 Original) is the exact replacement you need. Priced at Rs. 10,599, this battery is bench-tested at our shop — N.N Laptops, Hafeez Center, Gulberg III, Lahore — to ensure it delivers the performance Asus intended. Whether you're a student in Karachi, Islamabad, Rawalpindi, Faisalabad, Multan, Peshawar, or Sialkot, we ship nationwide via TCS/Leopards. In Lahore? Get same-day delivery. Every unit comes with our 30-day check warranty. Contact Sayam on WhatsApp 0314 4000131 to check stock or ask for live photos of the exact battery you'll receive.

Asus TUF Gaming F15 / F17 48Wh 3-Cell Battery (B31N1822 Original) — quick answer

The Asus TUF Gaming F15 / F17 48Wh 3-Cell Battery (B31N1822 Original) is a genuine, tested Asus replacement battery available at N.N Laptops, Hafeez Center, Lahore for Rs. 9,500. It's a 48Wh 3-cell internal pack rated at 11.4V and fits TUF Gaming F15 FX506, TUF Gaming F17 FX706, TUF Gaming A15 FA506. Comes with our 30-day check warranty plus Lahore delivery and nationwide.

This 48Wh, 3-cell internal battery is engineered for the TUF Gaming series — models like FX506, FX706, FA506, and FX505. It's a drop-in replacement: same size, same connector, same BMS chip, so Windows and your BIOS will recognise it instantly. We've tested hundreds of these, and the result is consistent: a full charge restores your laptop's original runtime of 5–7 hours for everyday tasks, and around 90 minutes for gaming. At Rs. 10,599, it's a cost-effective alternative to a brand-new OEM battery, and our rigorous bench-testing ensures you get a pack that's at 95%+ of rated capacity.

Full specifications

Note: This battery uses the original Asus part number B31N1822. It is also compatible with other part numbers such as C31N1822 and B31N1823 (check your sticker). If unsure, message us on WhatsApp 0314 4000131 with a photo of your current battery — we'll confirm within minutes.

Compatibility — which laptops does this battery fit?

This 48Wh 3-cell internal battery is a direct OEM replacement for the following Asus laptops:

• TUF Gaming F15 FX506
• TUF Gaming F17 FX706
• TUF Gaming A15 FA506
• TUF FX505

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.

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 3-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.

Why bench-tested matters

When you buy from us, you're not getting a random pull. Each battery is bench-tested on a dedicated charger-discharger unit. We measure capacity, cycle count, cell balance, and internal resistance. Only packs that pass all checks are listed — and we provide the actual test results on request. This means no surprises: the battery you receive will perform as advertised.

Installation — how to swap the battery

Internal 3-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.

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.

If you're not comfortable opening your laptop, remember we offer free installation at our shop in Hafeez Center. Bring your laptop, and Sayam will swap the battery and calibrate it for you. It's a 15-minute job with no extra charge.

Real-world battery life — what to expect

With this 48Wh 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.

For students attending online classes or professionals working from cafés, this 48Wh pack easily lasts through a half-day of Zoom calls, document editing, and web browsing. Gamers will appreciate that the battery supports the 48Wh capacity originally designed for the TUF series — it's not oversized, so the laptop stays slim and portable.

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 and Peshawar in 1-3 working days. WhatsApp 0314 4000131 to confirm stock.

Browse all our laptop batteries, laptop chargers, complete laptop parts catalogue.

We also encourage you to browse our entire range at nnlaptops.com, where you'll find chargers, keyboards, screens, and other upgrades for your Asus TUF and other laptops. All items are checked before shipping, and we're available on WhatsApp 0314 4000131 to help you find the right part.

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.

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.

Is this a genuine OEM battery or aftermarket?

Our stock comes in both genuine Asus pulls (tested cells, original casing, often the higher price) and high-grade A-class compatible cells (tested for capacity at 95%+ of rated Wh). Tell us which you want on WhatsApp 0314 4000131 — both carry the same 30-day check warranty.

How much battery backup will I get on my TUF Gaming F15 FX506?

With this 48Wh 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 3-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.

Can I use a higher capacity battery in my TUF Gaming laptop?

Some users ask about 90Wh batteries. While physically larger packs exist, they are thicker and may not fit the chassis or require a different cable routing. The 48Wh 3-cell battery is the standard internal size for these models. Our advice: stick with the OEM-specified capacity for reliable fit and performance. If you absolutely need longer runtime, consider an external power bank.

How does this battery compare to a new original Asus battery?

Our used-original batteries are removed from laptops that were traded in or upgraded. They typically have under 100 cycles and health above 95%. The price — Rs. 10,599 — is a fraction of a brand-new OEM battery, which can cost over Rs. 15,000. With our testing and warranty, you get similar reliability at a much lower cost.

N.N Laptops — Shop 66A, 3rd Floor, Hafeez Center, Gulberg III, Lahore. WhatsApp / Call 0314 4000131. Lahore delivery, with nationwide delivery via TCS / Leopards, 30-day check warranty.