--- title: "HP EliteBook 840 G5 / 840 G6 / 830 G5 50Wh 3-Cell Battery (CS03XL)" sku: NN-78CNA5NI brand: HP category: Batteries price_pkr: 11500 currency: PKR stock_status: instock url: https://nnlaptops.com/product/hp-elitebook-840-g5-840-g6-830-g5-50wh-3-cell-battery-cs03xl url_markdown: https://nnlaptops.com/product/hp-elitebook-840-g5-840-g6-830-g5-50wh-3-cell-battery-cs03xl.md image: https://nnlaptops.com/products/hp-elitebook-840-g5-840-g6-830-g5-50wh-3-cell-battery-cs03xl-1.webp date_modified: 2026-05-29 --- # HP EliteBook 840 G5 / 840 G6 / 830 G5 50Wh 3-Cell Battery (CS03XL) **Price:** Rs. 11,500 · **Brand:** HP · **Category:** Batteries · **SKU:** NN-78CNA5NI · **Stock:** In stock [View on nnlaptops.com](https://nnlaptops.com/product/hp-elitebook-840-g5-840-g6-830-g5-50wh-3-cell-battery-cs03xl) · [WhatsApp the shop](https://wa.me/923144000131?text=Hi%2C%20I'm%20interested%20in%20HP%20EliteBook%20840%20G5%20%2F%20840%20G6%20%2F%20830%20G5%2050Wh%203-Cell%20Battery%20(CS03XL)%20(NN-78CNA5NI).) ## Specifications | Spec | Value | |------|-------| | Brand | HP | | Compatible Model | EliteBook 840 G5, EliteBook 840 G6, EliteBook 830 G5, EliteBook 830 G6, EliteBook 850 G5, EliteBook 850 G6 | | Condition | Used - Tested | | Capacity | 50Wh | | Cells | 3-cell internal | ## Description HP EliteBook 840 G5 / 840 G6 / 830 G5 50Wh 3-Cell Battery (CS03XL) — quick answer The HP EliteBook 840 G5 / 840 G6 / 830 G5 50Wh 3-Cell Battery (CS03XL) is a genuine, tested HP replacement battery available at N.N Laptops, Hafeez Center, Lahore for Rs. 11,500. It's a 50Wh 3-cell internal pack rated at 11.55V and fits EliteBook 840 G5, EliteBook 840 G6, EliteBook 830 G5. Comes with our 15-day check warranty plus free Lahore delivery and nationwide Cash on Delivery. Full specifications Brand HP Capacity 50Wh Voltage 11.55V Cell Configuration 3-cell internal Chemistry Li-Polymer / Li-Ion (matched to OEM spec) Compatible Models EliteBook 840 G5, EliteBook 840 G6, EliteBook 830 G5, EliteBook 830 G6, EliteBook 850 G5, EliteBook 850 G6 Cycle Life (Rated) 400-600 full cycles Condition Genuine — Tested Warranty 15-day check warranty Compatibility — which laptops does this battery fit? This 50Wh 3-cell internal battery is a direct OEM replacement for the following HP laptops: EliteBook 840 G5 EliteBook 840 G6 EliteBook 830 G5 EliteBook 830 G6 EliteBook 850 G5 EliteBook 850 G6 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. Installation — how to swap the battery Internal 3-cell batteries on modern HP 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 50Wh 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. 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 pay — if Windows / macOS reads the correct cycle count and design capacity, you walk out happy. Lahore deliveries are free; nationwide via TCS / Leopards (Cash on Delivery) 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 , and complete laptop parts catalogue. Warranty — what you're protected against Every battery carries our 15-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 15 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 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. How much battery backup will I get on my EliteBook 840 G5? With this 50Wh 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 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 15-day check warranty. 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. N.N Laptops — Shop 66A, 3rd Floor, Hafeez Center, Gulberg III, Lahore. WhatsApp / Call 0314 4000131 . Free Lahore delivery, Cash on Delivery across Pakistan, 15-day check warranty. ## Compatibility, Warranty & Delivery FAQ ### Is the HP EliteBook 840 G5 / 840 G6 / 830 G5 50Wh 3-Cell Battery (CS03XL) compatible with my existing setup? The HP EliteBook 840 G5 / 840 G6 / 830 G5 50Wh 3-Cell Battery (CS03XL) is a standalone laptop. It works with any standard charger of the same brand/voltage, any USB / USB-C accessory, and any Pakistani WiFi network. Battery, RAM, and SSD are user-upgradeable on most models. WhatsApp 0314 4000131 with your specific use case and we'll confirm compatibility within 30 minutes. ### What warranty does the HP EliteBook 840 G5 / 840 G6 / 830 G5 50Wh 3-Cell Battery (CS03XL) include? Every unit ships with our 15-day check warranty starting from delivery. If the product develops a covered fault — power, screen, keyboard, battery, ports, or any defect not disclosed in the listing — courier it back to N.N Laptop in Lahore and we cover return shipping. We then repair, replace, or refund — your choice. ### Is Cash on Delivery (COD) available? Yes. Cash on Delivery is accepted on every order across all 20+ Pakistani cities we serve via TCS and Leopards courier. Inspect the product at your doorstep before paying. If anything is wrong, refuse delivery and you owe nothing. We also accept Bank Transfer, JazzCash, and EasyPaisa. ### Same-day delivery in Lahore? Yes — orders placed before 6 PM with a Lahore delivery address typically arrive the same evening via our city rider. Outside Lahore, delivery is 1–4 working days via TCS / Leopards. ## Pakistan-Wide Shipping | Region | Cost (PKR) | Transit (working days) | |--------|------------|------------------------| | Punjab (Lahore same-day) | Rs. 250 | 0–2 | | Federal Capital Territory | Rs. 450 | 1–2 | | Sindh (Karachi, Hyderabad) | Rs. 650 | 2–4 | | Khyber Pakhtunkhwa | Rs. 650 | 2–5 | | Balochistan | Rs. 700 | 2–5 | ## Contact - **WhatsApp / Phone:** 0314 4000131 (+92 314 4000131) - **Email:** Info.n.n.laptop@gmail.com - **Shop:** Shop 66A, 3rd Floor, Hafeez Center, Gulberg III, Lahore 54000 - **Hours:** Mon–Sat, 10:00 AM – 10:00 PM (closed Sunday) --- _Generated for LLM crawlers. Canonical HTML: https://nnlaptops.com/product/hp-elitebook-840-g5-840-g6-830-g5-50wh-3-cell-battery-cs03xl. Last updated: 2026-05-29T21:46:26.595Z._