Battery Security Question for City Riders

[PonjoCat]

Thanks for your comments CE, and you have some good ideas about fabricating a battery box. I'm still wondering what others do when they lock an e-bike up at the beach? Do you take your battery with you? Maybe I am being too paranoid about battery theft?

[commuter ebikes]

You could fab a box out of aluminum that would be the exact shape and size that you need. Put a locking door on it that opens with a key. With this setup, the thief would have to either defeat the lock or the hinges (or steal the entire bike).

You could bolt this battery box to the frame using the water bottle cage bosses. The bolt heads would be inside, inaccessible to the thief.

You could run the power wires through a rubber grommet.

The only disadvantage of this is the amount of time that it would take you to build it and, of course, the added weight.

[PonjoCat]

Hi,

This is my first post, and I want to thank everyone in advance for any help. This forum is awesome, and I've learned a great deal reading your posts.

I am planning a mountain bike conversion using a Cyclone mid drive and 52v Shark battery. My use will almost exclusively be to the beach and back (from Culver City to Venice/Santa Monica beaches), and I am concerned about someone stealing the battery. I realize that the Shark can be taken off the bike pretty easily by its owner, but I would not have a good place to store it securely when I am either on the volleyball court or surfing (in either scenario a person could easily walk away with my backpack while I am engaged in a sport). If I lock the bike up, I am afraid that it wouldn't be too hard for a thief to remove the battery using brute force. The bike, btw, will be locked up with a very good kryptonite lock. So I have a few questions, from basic/general to specific:

1. What do others in similar situations do with their battery/bike? (Even if I take the bike down to the sand, if I go in the water I would not be around to intervene if someone tries to steal it.)
2. Is having the Shark that much better and/or easier for charging than a built-in battery?
3. I am a decent metal fabricator, and I keep thinking that it would be better to fab a metal triangle a la a Sonders (I think theirs is plastic, but the design would be similar), and weld it to the frame for battery placement. (I am using a metal frame, and I could do just about anything to it), however, when I see pictures of people installing batteries, they are usually just using the bottle cage bungs to screw the battery bracket into the frame. I am assuming this is b/c it is easiest for the home builder, but I thought I would see if there are other disadvantages to built in battery "boxes".

Thanks for any feedback you can give me. I am mostly interested in how experienced users mitigate having a battery stolen.

Jon