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@GA2G
Mr.Timberg, first of all, I'd like to thank you very much for the challenge. Due to the nature of bike security, once the data and information is presented, it can be rather formulaic after that, with similar advice handed out time after time. But your challenge was good, and had me really think of how to supply a new solution for a new security situation.
As far as I know, your request is the first that includes a requirement for battery security, and is possibly the first electric bicycle dealt with in this thread. So, despite my answers before, it all comes down to this:
Lock rear frame and battery to railings/bike rack, with Abus Granit Plus X 54 300mm.
Lock front wheel to frame and railings/bike rack with OnGuard Brute X4 (LS) [save some money].
Disk alarm through chainring takes care of the required alarm.
My reason for rejecting the Krabus XL202, is that the most expensive part of your bike is at the back, so that would need a stronger lock than Krabus make. An alarm only draws attention to a theft, but if a person has got through a lock quickly, then the alarm was not enough of a deterrent.
I substituted the OnGuard for the Kryptonite, as the specifications are nearly identical, and indeed, the OnGuard Brute beat the Kryptonite Fahg Mini in a Maxim magazine test a while back, but its much cheaper.
Thats it. Whichever options you choose, I hope I was able to help.
By the way, the German Amazon site have the OnGuard Brute Mini (f*cking awesome lock) selling on their site, so hopefully, they stock a variation of locks, and you get what you ultimately need. As long as you choose locks from the first post of this thread, that are 16mm or thicker, you will be fine. Oh yes, the legendary Abus Grant Plus X 54 is allowed in, because though its bar is stated to be 13mm, the bar is squared, so its closer to 15mm at longest point of dissection.