HP ProBook 440 G7 / 450 G7 45Wh 3-Cell Battery (HSTNN-DB9A) — quick answer
The HP ProBook 440 G7 / 450 G7 45Wh 3-Cell Battery (HSTNN-DB9A) is a genuine, tested HP replacement battery available at N.N Laptops, Hafeez Center, Lahore for Rs. 10,599. It's a 45Wh 3-cell internal pack rated at 11.4V and fits ProBook 440 G7, ProBook 450 G7, ProBook 445 G7. Comes with our 30-day check warranty plus Lahore delivery and nationwide.
This battery is a popular upgrade for ProBook users in Pakistan, offering a balance of portability and runtime. At nnlaptops.com, we stock these tested units to ensure you get reliable performance without breaking the bank. The current price in Pakistan for 2026 is Rs. 10,599, making it a cost-effective replacement for your worn-out pack. Whether you're in Lahore, Karachi, Islamabad, Rawalpindi, Faisalabad, Multan, Peshawar, or Sialkot, you can get this battery delivered via TCS or Leopards with nationwide service.
Full specifications
| Brand | HP |
|---|---|
| Capacity | 45Wh |
| Voltage | 11.4V |
| Cell Configuration | 3-cell internal |
| Chemistry | Li-Polymer / Li-Ion (matched to OEM spec) |
| Compatible Models | ProBook 440 G7, ProBook 450 G7, ProBook 445 G7, ProBook 455 G7, ProBook 440 G8 |
| Cycle Life (Rated) | 400-600 full cycles |
| Condition | Genuine — Tested |
| Warranty | 30-day check warranty |
Why this battery stands out
Our team, led by Sayam, personally bench-tests every battery before listing. We measure actual capacity, cycle count, cell balance, and run a full charge-discharge cycle to ensure no thermal issues. Only packs meeting our 95%+ rated capacity threshold make it to the shelf. This means when you buy the HP ProBook 440 G7 / 450 G7 45Wh 3-Cell Battery (HSTNN-DB9A) from nnlaptops.com, you're getting a reliable, pre-verified component that restores your laptop's original runtime.
Compatibility — which laptops does this battery fit?
This 45Wh 3-cell internal battery is a direct OEM replacement for the following HP laptops:
- ProBook 440 G7
- ProBook 450 G7
- ProBook 445 G7
- ProBook 455 G7
- ProBook 440 G8
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 on WhatsApp 0314 4000131 — there are often three or four interchangeable part numbers per chassis. We keep a cross-reference for all ProBook G7/G8 models.
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.
Real-world performance across cities
Battery life varies with climate. In humid cities like Karachi or coastal areas, you might see slightly reduced runtime due to higher ambient temperatures, but our packs are built to handle up to 45°C. In Lahore's dry heat, expect the full 5-7 hours for web and office work. For customers in Islamabad or Rawalpindi, where temperatures are moderate, you'll often get even better efficiency. Same-day Lahore delivery is available, and we ship nationwide via TCS or Leopards to anywhere in Pakistan, including Faisalabad, Multan, Peshawar, and Sialkot.
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, Gulberg III — 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 45Wh 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 power users, we recommend using HP's Power Assistant to set a charging limit to 80% to prolong cell life.
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 — Sayam will personally assist you with live photos or videos of the exact unit.
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. This covers both genuine HP pulls and high-grade compatible options — just let us know your preference when you order.
Frequently asked questions
How much battery backup will I get on my ProBook 440 G7?
With this 45Wh 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 30-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.
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 this battery in ProBook 440 G8?
Yes, the ProBook 440 G8 shares the same battery connector and form factor as the G7 series. We've tested this pack in both generations and it fits and works perfectly. If you have a G8, you can order with confidence.
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.
