On Sat, 25 Feb 2012 10:13:27 +0000, Martin Brown wrote:

What might be an issue is that most sensible standby electronics
switches off when the battery gets too close to its death zone.

In the case of the Tesla it should probably sound an alarm or send a
"Charge Me" text to the owner or something when the battery is close to
becoming a brick. The only sensor needed is a low battery alarm!

I think there is one. The issue is if the car is parked unattended, and
discharge is faster than expected. The example given was an airport car
park and an extended trip away.

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