Lotus 2005 Elise Owner's Handbook Manual page 132

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 ig-
nition 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
sparking and current flow could cause serious burns.
To remove the battery, pull off the breather pipe (if applicable),
release the single screw securing the clamp bracket at the
base of the battery, and manoeuvre the battery from the base
retaining shoe.
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