Lotus ELISE 2007 Owner's Handbook Manual page 136

Battery clamp
If the battery is to be disconnected, the following precautions
should be taken:
i) Ensure that all electrical loads (e.g. lights) are switched off. If
the car is fitted with security coded audio equipment, check
that the code is available for entering after battery reconnec-
tion.
ii) Wait for at least ten seconds after switching off the igni
tion to allow the engine management system to adjust the
setting of some components ready for re-starting.
iii) Ensure the alarm is disarmed. If the battery is disconnected
when armed, the alarm will be triggered.
iv) Disconnect the negative (earth; black; '-') battery cable first,
and re-connect last.
WARNING:
If the battery positive terminal is inadvertently earthed
(e.g. when using a spanner) whilst the negative terminal is
still connected, the resultant short circuit with heavy spark
ing and current flow could cause serious burns.
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