Best to bypass the electric fence Grandad, we have a duty of care, even to thieves!
Having been victim to theft, it is tempting, though!
I really did toy with the idea of putting a small sign to the effect of "Dear Thief, please bear in mind that if you steal this bicycle you will find that you will need to pay £250 as it only works with one type of battery charger. If I were you, I wouldn't bother- it is more hassle than it is worth." on my bike!
The villainous swines.
Anyway, hopefully, having upgraded to a Magnum Plus lock (SoldSecure gold approved, insured up to £1200) this will be less of a danger.