What is available if anything

[Pinhead]

E bike battery locks

Surely there must be something available to add a lock to a battery

And I don't mean just replacing the existing key lock.

Any ideas

 

[m@Robertson]

Not really. I tried an Ottolock once. And it sort of worked, but an Ottolock is nigh-on worthless as it can be snipped literally in two seconds with ordinary workshop snips, and on your battery casing, it could be slid right off the end anyway.

 

[m@Robertson]

Maybe this will be a little less unhelpful. On bikes where I cannot permanently hide a battery under a cargo floor - not something possible on a normal bike - I changed the game, so to speak, and made the battery quick-detach.

Here's a before and after, below, and a how-to on whats inside the bag and why its relevant to your question.

https://talesontwowheels.com/2020/10/01/quick-release-easy-carry-ebike-battery-setup/
BEFORE (you can see the Ottolock on the battery wrapped around the center of it):

AFTER (now there's a battery bag):

 

[1Tuna]

Another great idea!

 

[1Tuna]

What's your thoughts with using these marine grade 10ga. quick connectors, generally for trolling motors, instead of XT90's? Usually come with caps.
https://www.amazon.com/Quick-Discon...x=2+pin+12v+10ga+quick+connect,aps,177&sr=8-2

 

[m@Robertson]

What's your thoughts with using these marine grade 10ga. quick connectors, generally for trolling motors, instead of XT90's? Usually come with caps.
https://www.amazon.com/Quick-Discon...x=2+pin+12v+10ga+quick+connect,aps,177&sr=8-2

That is a standard SAE connector. I forget its designation. XT90's are better - think on how the connection is made and you can see why they are better at water resistance, and pretty much not subject to coming loose, ever.