Dell Inspiron 15 5558 / 5559 / 3558 4-Cell 40Wh Battery (Original)

Dell Inspiron 15 5558 / 5559 / 3558 4-Cell 40Wh Battery (Original) — quick answer

The Dell Inspiron 15 5558 / 5559 / 3558 4-Cell 40Wh Battery (Original) is a genuine, tested Dell replacement battery available at N.N Laptops, Hafeez Center, Lahore. It's a 40Wh 4-cell removable pack rated at 14.8V and fits Inspiron 15 5558, Inspiron 15 5559, Inspiron 15 3558. Comes with our 30-day check warranty plus Lahore delivery and nationwide delivery via TCS / Leopards. Current price: Rs. 8,499 (please note this is an update from the previous Rs. 7,500 due to market fluctuations – we always offer the best value for genuine tested batteries).

Full specifications

Compatibility — which laptops does this battery fit?

This 40Wh 4-cell removable battery is a direct OEM replacement for the following Dell laptops:

• Inspiron 15 5558
• Inspiron 15 5559
• Inspiron 15 3558
• Inspiron 15 3567
• Vostro 3458

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. WhatsApp 0314 4000131 and we'll confirm compatibility within minutes.

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.

Additionally, every battery is bench-tested on our diagnostic rig to ensure it meets Dell's original performance specs. We simulate real-world charge/discharge patterns so you get a battery that performs like new.

Installation — how to swap the battery

Internal 4-cell batteries on modern Dell 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.

Real-world battery life — what to expect

With this 40Wh 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 Dell's 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 best results, use Dell Power Manager to set charging thresholds and prolong battery lifespan.

Where to buy — 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 pay — 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, Rawalpindi, Faisalabad, Multan, Peshawar, and Sialkot in 1-3 working days. WhatsApp 0314 4000131 (Sayam) to confirm stock or get live photos of the exact unit.

Browse all our laptop batteries, laptop chargers, and complete laptop parts catalogue on nnlaptops.com.

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 / Dell Power Manager / macOS Battery Health show full information including cycle count and design capacity. No 'plugged in, not charging' driver errors.

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 much battery backup will I get on my Inspiron 15 5558?

With this 40Wh 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.

Is this a genuine OEM battery or aftermarket?

Our stock comes in both genuine Dell 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 do I check compatibility?

Look for the Dell part number on your old battery (e.g., J1KDY, PJ8HX, 0C6W4, 5D9XY). Compare it with our list or send us a picture on WhatsApp 0314 4000131, and we'll confirm in seconds.

N.N Laptops — Shop 66A, 3rd Floor, Hafeez Center, Gulberg III, Lahore. WhatsApp / Call 0314 4000131. Lahore delivery, nationwide via TCS / Leopards, 30-day check warranty. Visit nnlaptops.com for the best Dell Inspiron 15 5558 battery price in Pakistan 2026.