Anybody done it? My K5 sits for long periods so the battery is usually low. I'm thinking about installing a tender with a plug in the grille so it could be easily plugged in like a block heater.
WWCK5D?
WWCK5D?
I'm considering this one - http://www.amazon.com/gp/aw/d/B0000AXTUY?pc_redir=1414140311&robot_redir=1
It's got a really short 110v cord so I'd probably mount it behind the grille and then extend the battery leads to fit (battery is on firewall).
I have one of those, and thus far (only had it a few months) it's behaved well. I haven't gotten around to making the cord clever to the grille, just leave the hood popped and run an extension cord from the shed to the truck.
I'd say you're on the right track.
-- A

I picked up the little Schumacher unit I linked to yesterday. Hopefully I'll have it mounted with pics and charging in the next day or so.