similar issue....I thought the charging port was the place to unlock it when trying to unlock the battery the first time and apparently shorted the fuse after briefly touching the port with the key. RAD will not replace my battery so I must spend $600 on a new one. I admit this is partly my fault but this is a very common mistake I'm seeing and a horrible design flaw of the battery that you can't easily change the fuse...and the response to RAD by not replacing (or offering to repair it) is very upsetting since I've only used this thing for one charge. This was a birthday present for my son and he's upset, I'm upset....ready to take this to the dump I'm so pissed.

bought a RadRover6 Plus for my son for his birthday...we've both had a great time riding it on the initial charge...then went to unlock the battery to charge it and when trying to unlock in my garage where it was kinda dark, I thought the charging port was the place to unlock it and immediately a spark came out. I thought I was an idiot but now see it's a very common mistake and obvious design flaw not having a simple way to replace the fuse. My main issue is Rad's response saying it's not covered and I have to spend $600 to get a new battery. I'm now seeing here that it's just a simple 10 cent fuse that can be replaced and other users are fixing it themselves. Why can't / won't Rad offer to fix the battery rather than requiring us to buy a new one? I liked this company initially but their response to this issue is very frustrating for me. I was going to buy another one but not now. Thanks to all of you for showing how to fix the battery- not sure I'll be able to figure it out but will give it a shot- otherwise I might be taking this thing to the dump I'm so pissed at them.