what is the maximum wattage? I used a similar one before which was only 120w max and did not provide the full output of my 240w laptop charger.

Realize this is late to the party but for others who might read...I used this with my Alienware m15 R7 laptop which was drawing a max of 180w while gaming. The the adapter was fine, not hot. The power jack on this laptop is right next to the hot output fan so it was a little hard to tell if the adapter was actually a little warm from the current or just picking up heat from the output fan (these laptops run hot when gaming). My laptop ships with a 240w power supply but in reality I've not actually seen it draw over 200w. However your amperage may vary. I have Nvidia 3060 but other models may have up to 3080 or 3090 which I'm sure will draw more power. Personally I would be careful with anything over 240w with this adapter. Run some attended tests before using unattended.

Does this work using a dell precision 7740 laptop and its 240watt power supply that the 7740 comes with ? .

Should work if the laptop takes a 7.4 mm connection

Does this work on HP G7 laptop?

I have never used it for HP laptop, but I think it will work with what I can find online. It definitely works with Dell Latitude laptops. the charger plug has a 7.4mm outer diameter. and a 5mm inner diameter with a pin. Hope this helps.

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7.4mm x 7.4mm Right Angle 90-Degree Power Adapter Connector Converter for Hp Pavilion Probook Elitebook Envy Compaq Presario/Dell Latitude Inspiron XPS Studio Vostro Laptop AC Charger[1Pack]

7.4mm x 7.4mm Right Angle 90-Degree Power Adapter Connector Converter for Hp Pavilion Probook Elitebook Envy Compaq Presario/Dell Latitude Inspiron XPS Studio Vostro Laptop AC Charger[1Pack]

Product ID: 268455444

Details

Compatible devices
Laptop
Specific uses for product
Laptop
Connector type
Barrel
Colour
1 Pack
Brand
Iwlikey

⚡Leakage & short circuit protection

🔌7.4mm x 7.4mm precision fit

↪️90-degree right angle design

Description

🔌 Power up smartly with the adapter that fits your hustle!

PRECISION 7 4 MM FIT - Engineered for perfect compatibility with HP, Dell, and Compaq laptops—no loose connections.
LIGHTWEIGHT COMPACT - At just 10g and 2cm length, it’s the discreet upgrade your power setup deserves.
DURABLE HEAT RESISTANT - Crafted from stain and warm-resistant plastic for long-lasting, reliable performance.
SAFE CHARGING GUARANTEED - Original chip ensures smooth current flow with built-in leakage and short circuit protection.
SPACE SAVING RIGHT ANGLE - Maximize your workspace with a sleek 90° connector that prevents cable clutter.

The Iwlikey 7.4mm x 7.4mm Right Angle Power Adapter Connector converts a straight power plug into a space-saving 90-degree angle, designed specifically for select HP, Dell, and Compaq laptops. Made from durable, heat-resistant materials, it features an original chip for safe, efficient charging with leakage and short circuit protection. Lightweight and compact, it’s the perfect accessory to keep your workspace tidy and your device powered reliably.

Specifications

ASIN	B07H3S6DVV
Best Sellers Rank	#161,841 in Computers ( See Top 100 in Computers ) #1,634 in Laptop Chargers & Power Supplies
Brand	Iwlikey
Color	1 Pack
Colour	1 Pack
Compatible Devices	Laptop
Compatible devices	Laptop
Connector Type	Barrel Connector
Connector type	Barrel Connector
Current Rating	3 Amps
Finish	Plastic
Finish type	Plastic
Input Voltage	20 Volts
Item Weight	10 Grams
Manufacturer	Iwlikey
Mfr Part Number	90D 1Pack for HP7450 Connector
Model Number	90D 1Pack for HP7450 Connector
Number of Items	1
Number of Ports	1
Package Quantity	1
Power Plug Type	No Plug
Specific Uses For Product	Laptop
Specific uses for product	Laptop
UPC	760970715006
Unit Count	1.0 Count
Warranty Type	Limited

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