Why your HP ZBook 15 G3 / G4 needs this 90Wh battery
If your HP ZBook 15 G3 or G4 workstation is only lasting an hour on battery, the AR08XL 90Wh pack is the fix you need. This genuine, bench-tested HP replacement battery restores your laptop to its original runtime — web and office work for 5–7 hours, video playback for 6–8 hours, and even heavy tasks like code compilation or Photoshop for 2–3 hours. It's a 6-cell internal Li-Polymer pack rated at 11.4V and 90Wh, built to OEM specifications and fully compatible with ZBook 15 G3, ZBook 15 G4, ZBook 17 G3, ZBook 17 G4, and ZBook Studio G3.
Full specifications
| Brand | HP |
|---|---|
| Capacity | 90Wh |
| Voltage | 11.4V |
| Cell Configuration | 6-cell internal |
| Chemistry | Li-Polymer / Li-Ion (matched to OEM spec) |
| Compatible Models | ZBook 15 G3, ZBook 15 G4, ZBook 17 G3, ZBook 17 G4, ZBook Studio G3 |
| Cycle Life (Rated) | 400-600 full cycles |
| Condition | Used - Tested |
| Warranty | 30-day check warranty |
HP ZBook 15 G3 / G4 Workstation 6-Cell 90Wh Battery (AR08XL) — quick answer
The HP ZBook 15 G3 / G4 Workstation 6-Cell 90Wh Battery (AR08XL) is a genuine, tested HP replacement battery available at N.N Laptops, Hafeez Center, Lahore for Rs. 15,899. It's a 90Wh 6-cell internal pack rated at 11.4V and fits ZBook 15 G3, ZBook 15 G4, ZBook 17 G3. Comes with our 30-day check warranty plus Lahore delivery and nationwide.
Compatibility — which laptops does this battery fit?
This 90Wh 6-cell internal battery is a direct OEM replacement for the following HP laptops:
- ZBook 15 G3
- ZBook 15 G4
- ZBook 17 G3
- ZBook 17 G4
- ZBook Studio G3
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 6-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.
Real-world usage and buying advice
This battery is perfect for professionals who rely on their ZBook for mobile work — architects rendering on the go, developers coding at co-working spaces, or video editors cutting in the field. With a fresh 90Wh pack, you can confidently work through a flight from Lahore to Karachi without hunting for a power outlet. We recommend calibrating the new battery after installation: charge to 100%, let it discharge to near 0%, then charge again fully. This ensures Windows reports accurate capacity from day one.
For those concerned about long-term battery health, avoid leaving the laptop plugged in at 100% constantly. Instead, keep the charge between 40% and 85% for daily use. Our 30-day check warranty covers any defects — if the battery fails to hold charge or shows swelling, bring it back to Hafeez Center, Lahore for a full replacement. We also offer free installation in our shop if you're local.
Where to buy and delivery options
You can buy this HP ZBook 15 G3 / G4 Workstation 6-Cell 90Wh Battery (AR08XL) from our shop at Shop 66A, 3rd Floor, Hafeez Center, Gulberg III, Lahore. The price in Pakistan 2026 is Rs. 15,899 — a competitive price for a genuine, bench-tested pack. We deliver free within Lahore on the same day, and nationwide via TCS / Leopards to cities like Karachi, Islamabad, Rawalpindi, Faisalabad, Multan, Peshawar, and Sialkot. WhatsApp 0314 4000131 to confirm stock or ask for live photos of the exact unit. Visit nnlaptops.com for the full range of laptop batteries, chargers, and parts.
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
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.
Do I need to take the laptop apart to install the 6-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.
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 HP 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.
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.
