Extending the crowd funding campaign is what one does after the VC firm closes your bank account and says, "Hell no! We will NOT be paying people to take product that 'works' by violating the first and second laws of thermodynamics. Figure this mess out by yourselves."
September 26th is well outside the start window for the holiday season. They are going to have to buy tooling. They need to make progressive dies to whack out the clips, and I don't see how that can be done, qualify/tweak the tools and still get stuff on a cargo container for November delivery. There's also also the production and test fixtures that will need to be made. The injection molds appear to have been taken care of already, or maybe not. I couldn't see a witness line around the logo on the plastic case, but maybe they had a really good insert made for an existing tool(s).
If Batteroo is using this money to build tooling - which I'm guessing they are and is why they had to extend the campaign - don't get your hopes up on seeing your Batteriser any time soon. Even in China, $300k can disappear in heartbeat. I just don't see enough capital here to build 100k+ of anything.