Dell 240W Big Barrel Charger for Precision 7720 Workstation — quick answer
The Dell 240W Big Barrel Charger for Precision 7720 Workstation is a genuine, tested Dell 240W power adapter available at N.N Laptops, Hafeez Center, Lahore for Rs. 11,500. It outputs 19.5V at 12.3A through the 7.4mm × 5.0mm barrel connector and is the OEM-spec charger for Precision 7710, Precision 7720, Precision 7730. Backed by our 15-day check warranty with free Lahore delivery and Cash on Delivery across Pakistan.
Full specifications
| Brand | Dell |
|---|---|
| Wattage | 240W |
| Output Voltage | 19.5V |
| Output Current | 12.3A |
| Connector Type | 7.4mm × 5.0mm barrel |
| AC Input | 100-240V, 50-60Hz (Pakistan compatible) |
| Cable Length | ~1.8m (brick to laptop) + ~1.5m wall cord |
| Compatible Models | Precision 7710, Precision 7720, Precision 7730, Alienware 15 R3, Alienware 17 R5 |
| Condition | Genuine — Tested |
| Warranty | 15-day check warranty |
Compatibility — which laptops does this fit?
This 240W Dell charger is the OEM-spec power adapter for:
Wattage and connector are the two factors that decide compatibility. The 7.4mm × 5.0mm barrel connector physically matches only the listed models — do not force it into a different-size port. If you have a related but different model, WhatsApp us with the exact spec sticker text and we'll confirm before you buy.
What's in the box & build quality
Every charger we ship includes the brick-to-laptop cable (fixed), the Pakistan 3-pin C5 'mickey-mouse' wall cord, and a soft pouch for travel. Build quality on this Dell unit is exactly what came with the laptop new — same chassis injection, same internal magnetic shielding, same cable strain-relief.
What you get
- 1× Dell 240W adapter brick
- 1× Pakistan/UK 3-pin AC cord
- 15-day check warranty card
Real-world use — what to expect
Plug it in and the laptop charges at full speed: 0-50% in about 35-45 minutes on most modern Dell machines, full charge in 1.5-2 hours. The brick warms up to 40-45°C under load — that's normal for a switching power supply, not a defect. The white LED on the tip turns on the moment AC is connected, so you have instant visual confirmation the brick is alive even if the laptop battery is fully drained.
How to verify you've got the right charger
Three checks before you buy:
1. Wattage
Look at the sticker on the bottom of your current charger — if it says 240W, you're matched. A higher-wattage Dell charger is also safe (laptop only draws what it needs); a lower-wattage one will run the laptop but won't charge under heavy load.
2. Connector size
Use a calliper or compare to the sample photo. 7.4mm × 5.0mm barrel is the only fit — don't force a wrong-size pin.
3. Voltage
Must be 19.5V. Never use a Dell charger from a desktop or printer — those are 12V DC and will damage the laptop board.
Where to buy in Lahore — and shipping nationwide
We're at Shop 66A, 3rd Floor, Hafeez Center, Gulberg III, Lahore. Walk-in welcome — bring your laptop and we'll test the charger on it before you pay. Lahore deliveries are free; nationwide via TCS / Leopards (Cash on Delivery) reach Karachi, Islamabad, Faisalabad, Multan, Peshawar in 1-3 working days. WhatsApp 0314 4000131 to confirm stock.
Browse all our laptop chargers and laptop parts, or our complete laptop battery range.
Warranty & after-sales support
Every charger carries our standard 15-day check warranty — if the brick fails on first install, develops an output fault, or shows AC ripple during the test period, bring it back to the shop with the invoice for a full replacement or refund. No questions asked within the warranty window.
Frequently asked questions
Is this an original or compatible charger?
Both options come through our stock. This unit is a genuine Dell pull-out from working laptops, fully tested for output voltage stability, ripple, and protection circuits. We also stock high-grade compatible versions if budget is tight — just tell us on WhatsApp 0314 4000131 which you prefer.
Can I use a higher-wattage charger instead?
Yes, higher wattage is safe as long as the voltage matches. A 265W or 285W Dell brick with the same 7.4mm × 5.0mm barrel works fine and will not damage the laptop. The laptop only draws what it needs — extra headroom helps for fast-charge mode and heavy GPU loads.
Will this 240W charger work with my Precision 7710?
Yes. This adapter outputs 19.5V at 12.3A which exactly matches the Precision 7710 (and all other listed models). The 7.4mm × 5.0mm barrel connector is the OEM specification — no adapter or convertor required. Plug it in and you're charging at full speed.
What about the new USB-C version — should I switch?
If your laptop has a Thunderbolt or USB-C charging port (most Dell models from 2019 onwards do), USB-C PD is the future-proof choice — you can charge from any compatible 65W+ brick, phone bank, or hub. For older slim-tip / barrel models, stick with the original-style charger listed here.
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.
