What is the polarity of the adapter? Or can someone post a good picture of the back with the info on it?

INPUT:100~240V 50-60Hz 1.8A OUTPUT:19.5V 12.3A

Can this be used for Dell G15 5511 180W ?

Yes, it is compatible with 180w

Does it compitable to Alienware m15 R7?

Yes, it's compatible with the Alienware M15 R7. Don't worry, you can contact our customer service if you have any problems.

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Description

⚡ Power up like a pro — never settle for less!

POWERHOUSE PERFORMANCE - Delivers a robust 240W output to keep your Alienware and Dell Precision laptops running at full throttle.
PRECISION FIT CONNECTOR - Engineered with a 7.4mm x 5.0mm plug for seamless compatibility and secure connection.
UNIVERSAL COMPATIBILITY - Supports a wide range of Dell Alienware and Precision models, future-proofing your power needs.
FAST RELIABLE CHARGING - Optimized for rapid power delivery so you never miss a beat during critical work or gaming sessions.
COMPREHENSIVE SAFETY SUITE - Built-in over-current, over-voltage, and temperature protections ensure worry-free charging.

This 240W laptop charger is designed for Dell Alienware and Precision series, featuring a 19.5V/12.3A output and a 7.4mm x 5.0mm connector. It includes advanced safety protections and supports fast charging, ensuring reliable and efficient power delivery for high-performance laptops.

Specifications

Item Weight	1.3 Pounds
Unit Count	1 None
Number of Items	2
Color	BLACK
Energy Specifications Met	CE
Output Current	12.3 Amps
Output Voltage	19.5 Volts
Power Source	Corded Electric
Current Rating	1.8 Amps
Frequency Range	50-60Hz
Main Power Connector Type	3 Pin
Portable	Yes
Input Voltage	240 Volts
Mount Type	Wall Mount
Amperage	12.3 Amps
Wattage	240
Connectivity Technology	USB
Connector Type Used on Cable	Connector size: 7.4mm*5.0mm.
Compatible Devices	Compatible with 19.5V-9.23A 180W;Compatible with Dell Alienware Precision Laptops
Compatible Phone Models	Compatible with Alienware 15 R1 R2 R3 17 R1 R2 R3 13 R1 R2 R3 R4; Alienware M15 R1 R2 R3 M17 R1 R2 R3 R4 R5 M11X R2 R3 M14X R1 R2 M17X M18X R2 R3 R4; Dell G3 Series 15 17 3579 3779 3500 G5 15 5587 5590 5500 G7 15 17 7588 7500 7590; Dell Precision Series 7720 7520 7530 7710 M6800 M4600 M4700 M4300.
Additional Features	Fast Charging

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