What device for e-cargobike theft protection?

I'd like a recommendation for a device for a cargobike.

Here's are my wants/needs:

• Should work well with Traccar without hacking or assembling anything.
• 4G support is needed as 2G and 3G has been phased out.
• Needs to have its own battery (the ebike battery doesn't stay on the bike when I leave it).
• It needs to be quite easy to take off the bike to take inside to charge it.
• It should have good battery life. When sending position every 60 seconds battery should preferably hold 14-30 days, if possible.
• Battery should be replaceable.
• Nice if it looks inconspicuous, like a plain white box.