GPK Systems Ac Adapter for Compaq Presario Cq57-310us Cq57-315nr Cq57-319wm Cq57-339wm Cq57-410us Cq57-439wm Cq56-109wm Cq56-115dx Cq56-134ca Cq62-238dx Cq62-411nr Cq62-423nr Laptop Power Supply Cord Notebook Battery Charger Input: 100 - 240 V (worldwide use) Output:18.5V 3.5A 65 Watt Service & Support 1 year warranty Designed exclusively for use with the laptops 100% compatibility with the original Replacement power supply AC power adapter was tested to match and/or exceed original product at low price.