The image above is all you need. This isn't rocket science. The problem is that Aventon hides behind "safety" as an excuse, when they're forcing people to be unsafe with their proprietary junk.
I have a Level v1 and Aventure v1. I live in WI and ride all year. Some salt water got into my Level from going through winter road water, and the contacts corroded in the frame, like it would for any “fake” sealed enclosure. The resistance caused the terminals to heat and melt. The issue is all over the internet, and not uncommon. I could not find the end cap for the battery anywhere, not on Aliexpress, not anywhere. (I do lots of hobby electrical). I contacted them, they would sell me a battery and “new” pins for $400, a steal. It’s a $4 connector. Forget that, I popped the top off and made everything XT60 and waterproofed it. I can’t take the battery out, but there was nothing wrong but their shotty engineering (have a story about the frame charger).
Oh, I forgot this part. I actually bought a showroom v2 battery (more on my local showroom experience later), and I had no clue that they changed the battery config on the v1 halfway through production. I bought the battery, it literally fits the exact enclosure, any normal person would think “I’m good to go.” This was a factory battery from a dealer. Little did I know, you SHOULD NOT use a v2 battery in a v1. You can’t even tell the difference between the two except a green dot. I asked them what the difference was, they would not tell me. They just said don’t, and if you do, you risk controller failure and injury. That right there is a company that care about safety! I’m going to change things up completely, make it “mostly” compatible, but not really tell you why. AND they offered to sell me the new v2 batter cradle. That’s really why I ended up on this forum to start.
Mind you, I had many, many quality issues with them before this. Including getting a small Pace delivered after a 6 week wait, instead of my L Level. I have much more to complain about. You can move this to a different thread, so I can complain about the other stuff. I don’t do forums much, but I can’t allow Aventon ripping people off anymore. The bikes are great, for 6-10 months. If you can afford to dump your $2k and get that amount of use out, I wish I was you. Also shame on me for ever suggesting Aventon as a good bike.
Attached photos are a Satiator, from a REAL company people should support, Grin, charging a stupid Aventure battery with an unnecessary connector. An unsafe one at that. This connector cost them more for fake proprietary, than many safer connectors out there, like an GX16. It’s stupid, careless, and serves no purpose other than to rip off the customer. The first photo is me testing the pinout with the Satiator, a computer power cord (I'm in IT and have 1ks of them), and two paper clips. It charge fine.