Guild Wars 2

I was wondering if anyone knew exactly how the buff after air overload works.

Does the field that is left after the overload give you the buff or is just finishing the overload itself that does?

Does it hit your target or the first thing to get hit by one of your attacks? (if you cast aoe on a group without a target which one gets struck?)

If you can get the buff more than once per overload what’s the maximum number of lightning strikes you can get?

Finishing OL gives the charge.
It applies to 1st target you hit and only one target.
Can’t stack, only refreshes duration.