If you're looking for a power cable for a laptop adapter that's 1.35 meters long, "DPN" likely refers to a specific model or brand. Here are a few tips to find the right one:

1. **Check Compatibility**: Ensure the cable is compatible with your laptop adapter's connector type and voltage requirements.

2. **Specifications**: Look for cables that specify length (1.35 m) and confirm they meet safety standards.

3. **Where to Buy**: You can check online retailers like Amazon, eBay, or electronics stores. Search for "laptop adapter power cable 1.35m" along with the brand or model if you have it.

4. **Local Stores**: Sometimes, local computer or electronics stores may have what you need and can help you confirm compatibility.

If you need help with specific models or brands, let me know!