Kryptonite cable will draw back only amateurs. It is very easy to cut it with proper tools. Only thick chain can slow down professionals.
Here is one test (in slovak language):
http://motoride.sk/c/1014/test-moto-zam ... oreny.html
Result:
- steel cord protected with steel cylinders 10 mm / defeated
- steel cord 20 mm / defeated
- steel chain 11 mm / undefeated
- disc brake lock / undefeated
They used liquid nitrogen and blow torch to weaken the metal.
And all this matters only in case when thief don't lockpick the lock:
https://www.youtube.com/watch?v=l5efaWSWwlk (Master Lock U)
https://www.youtube.com/watch?v=e2wPNvyzHaE (ABUS Lock)
https://www.youtube.com/watch?v=_2vLtpVPqhI (Kryptonite Lock U)
So to sum this up, locks of whatever type can only draw back amateurs and slow down professionals. Insurance is the best way to protect your investment, but if the insurance prices are as high as we have them in Slovakia (15% of new bike price per year), you have to count on locks
PS: battery switch is a good idea, I consider it by myself, at least it will stop a thief from driving away.