Thanks all for posting your insights and experiences!

My charging fuse blew when I plugged it in to the charger (not sure why; charger still works).  Rad is replacing the battery under warranty (after a little back and forth - it needed to be escalated to a supervisor customer support before they would cover it), but it is going to be at least a month for shipping unfortunately.  I was able to get my battery working again following these instructions.  It took about 10 minutes.  I scratched the plastic cover for the T10 screws trying to get it off with a screwdriver, but other than that it seems to be a very easy fix.  I used a small piece of electrical tape to seal the hole in the plastic and then the Permatex Ultra Black gasket maker suggested above to seal over that. 

I really can't understand why Rad designed the battery this way.   $600 for a new battery is absolutely crazy when the fix is a $0.50 fuse. 

Quote from: BriainO on February 23, 2022, 07:03:01 AM
Thanks a million for sharing, @DickB.

I needed to register with this forum to view the photos... radpowerbikes.eu told me they would replace the battery, but due to changes in dangerous, or hazardous goods' regulations in January 2022, they have been unable to ship any batteries and it will still be around 2-3 weeks from now until they can possibly ship due to ironing out the bureaucracy between Customs and the their suppliers and manufacturers. At this time they are not advising customers to do the fuse fix themselves. I hope they may provide support on their help pages soon... additionally I encourage them to include the following warning in the manual: Don't poke the charge-port with your key!

Thankfully, it's an easy enough fix.

1. Remove the end cap was tapping the ends with a hammer and screwdriver. Don't lever with your carving knife, the tip will break off!

2. Remove the 4x torx #10 screws holding on the endcap.

3. Carefully make a slit in the thick plastic wrap.

4. Firmly grip the Red 10A fuse. It's a micro type and it's seated very firm.

5. Replace the fuse with another 10A micro-fuse.

6. Tape (or silicone) it up. I used electrical insulating tape and Duct tape over that.

7. Charge your battery as normal (I charge mine to 80-90% for longevity, unless I'm doing a big ride)