Several warnings at once
One interruption in power or module communication can cause several warnings. Note which warning appeared first, whether there was recent battery work and whether switching off and restarting changes the symptoms.
A battery that keeps going flat
A flat battery can reflect battery condition, charging performance, usage or an unexpected draw. The time it takes to lose charge and any recently fitted accessories help guide the tests.
When a fault only happens sometimes
An intermittent window, light or other electrical feature may behave differently in rain, cold weather or over bumps. A photo or short description of the conditions is often more useful than trying to reproduce the fault repeatedly.