The term parasitic battery draw refers to the electrical devices
that continue to draw current from the battery when the ignition
key is in the OFF position. As a rule of thumb normal parasitic
draws are below 50 milliamps, however it is always best to refer
to the original vehicle manufacturers specifications for
recommended limits. Before a parasitic draw test can be
performed the batteries state of charge must be greater than
75%. Before testing a battery it is very important to follow
some simple safety rules. Always wear eye protection and keep
open flames away from the battery. If using a battery charger,
always confirm that the charger is off before connecting or
disconnecting the charger. Batteries produce hydrogen gas which
is extremely flammable; do not smoke while servicing a battery.
Batteries should only be charged in well ventilated areas. The
electrolyte in the battery contains sulfuric acid, latex gloves
are highly recommended. Testing For Parasitic Draw To perform
the parasitic draw test you