1. The connector shape

Compare the tip shape and pin layout to the product photo — pixel for pixel, not just "close enough."

2. The size, with a ruler

Measure the outer and inner diameter of your original tip, e.g. 5.5mm × 2.5mm. A guess here is how the wrong one ends up in your basket.

3. What you see is what you get

Every photo on this page is our actual stock — no stock-library stand-ins — so it's a true reference to check against.