It looks like you're looking for a laptop charger for an HP laptop with specifications of 18.5V, 3.5A, 65W, which is commonly referred to as the "HP Big" charger due to its larger power output. These chargers typically support HP laptops that require more power, like certain models of HP Pavilion, HP ProBook, or HP Envy series.

Here are a few options for finding a compatible charger:

1. COMPATIBLE HP Charger

• HP 65W 18.5V 3.5A AC Adapter
• COMPATIBLE HP chargers are always a safe choice for compatibility and reliability. 

2. Third-Party Compatible Chargers

Many third-party manufacturers produce compatible chargers that offer similar specifications at a lower price point. Some reliable brands include:

Be sure to check that the output voltage (18.5V), current (3.5A), and power (65W) match exactly with your laptop's requirements. Also, confirm that the connector size is compatible with your laptop.