I just got my first AGM deep cycle battery for my trolling motor. What do you guys recommend for a charger? I don't want an on-board charger. 

Thanks

NoCo Genius or Battery Tender.

NoCo Genius - no brainer

Ditto, get the 5 or the 10, the 5 taking twice as long to charge a battery then the 10.

 

if you have a 100ah AGM and use up 70% it’d take 14ish or 7ish hours to charge.

For a group 27 agm or bigger definitely a genius 10.