I bought my 01 f4i with a hookup for like a battery tender or trickle charger to charge it over winter. What is the best kind of charger to get for this?

 

its a two prong design one male one female side by side

 

depends on what type of hook up you have?

 

They're pretty much all the same. Got mine at sears, cause it was on sale for $25.
You can get one at any auto-part store. Just shop around for the best deal.

Mine came with a 3 dongles, one for battery (like yours), one with regular clips, and one with a
cigarette plug for charging a car overnight. They, pretty much, all come with a 'smart-circuit' that
monitors the battery so it doesn't over-charge it. Be sure and look for that
feature, just to be sure.

Ern