I understand your frustration. I searched high and low, including Grin and the factory website in China that makes the Aventure charger for a connector, for anything that could be adapted but didn't find that particular connector there as well. I used the model number on the charger and came up with zero, nothing anywhere on the internet. I wrote extensively about brake pad replacements in another post and highlighted problems with customer support from Aventon. They are the worst! I foolishly sent them another email looking for a second battery and have heard nothing in well over two weeks. I called a local shop that sells the Aventure (I bought it direct from Aventon, bad move on my part) and they indicated that Aventon hopes the batteries will be available at the end of the summer! I hope mine doesn't fail. Can you believe this stuff? Aventon advertises their bikes extensively but offers NO support for replacement parts. They are basically unreachable. I don't know how they can go on selling bikes they can't service. We are dead in the water after the one year warranty for chargers, batteries, brakes, etc.