Sangorei,
How did it go with the warranty work? I just had a disappointing experience with my own battery getting ruined and not getting helpful support from Torqeedo.
Sadly, the battery isn't nearly as waterproof as you might expect.
I bought the 403 along with the torqueedo brand solar panel with the idea that I'd never have to disconnect anything. This worked great for a few weeks but then my battery stopped working.
1.) I discovered the battery had water inside and wasn't charging properly. I contacted Torqueedo and said it was strange since I hadn't even taken it out on the water in over a week but there had been heavy rains. I also included a picture -
https://ibb.co/kuMmsK - showing the setup which I thought was a good way to use the system.
2.) Torqeedo wrote back to say the battery is IP67 rated and if its exposed to water longer then 30 minutes, including rain, then it would be ruined. They sent me a box to return the battery so they could check for a manufacturing defect.
3.) Battery was returned to Torqeedo, no manufacturing defect was discovered so it won't be replaced under the warranty. They did offer me a new one for $400, a $30 discount over what I'd pay for a new one at Marine Defender.
4.) I asked for my broken battery to be returned to me, so an electronic friend of mine could mess around with it, maybe salvage some parts for his projects but Torqeedo had already disposed of my battery.
I'll end up buying a new battery from Marine Defender vs. getting my $30 discount. It was pretty disappointed that they were not more helpful and wouldn't even send me my broken battery back! The new one I'll find a way to protect it, maybe getting a small cooler that I could keep it inside and cut some holes (with rain covers) for the cables.