^^ Me too. On the way to pick up the battery the fan stopped working again. I had to wiggle the connector to get it back working. I ordered another plug for it. In the meantime, I unplugged the fan and notice the plastic had melted over the contact partially. I chipped away the melted plastic with a pick tool and noticed the contact became a bit recessed from the melting plastic, so I pulled it forward and bent it down to make better contact then added a bit more dielectric grease. I cleaned up the battery terminals really good and coated them with white lithium grease. Installed the new battery and the fan fired back up. So far so good. When the new plug comes I'll solder that in place and see if the plug has anymore heat damage. I really think it was the weak battery voltage causing the issue exacerbated by the corrosion on the negative terminal. It was inside and outside the terminal causing poor ground. I'll report back how the contact looks when I get the new plug.