Ok @Way2slow  if your slow I don't know what I should be called lol. To make sure I'm comprehending everything, we want a 10-15 amp smart charger with automatic/float maintenance mode that once in this mode delivers no more than 13.2v and is preferably adjustable?

 

 

If I got all that right do you have any brands to reccomend for us? Thanks again

Great stuff, @Way2slow.  Thank you much for taking the time. 

 

This thread (or at least W2S's posts) might/should be pinned.

 

I've been using a NOCO Genius 7.2A charger (from Amazon) with good results.  I recently 'acquired' a newish Schumacher like the one pictured earlier in this thread.  Both seem to satisfy my requirements (3 size 27 Interstate batteries - TM use only.)  Best I can tell...and after I test the maintenance voltage....I can safely use these chargers for charging and for winter 'maintenance'.

 

    New question.  For my yak sonar, I use 12V 9Ah sealed lead acid (SLA) batteries.  My first purchase of these came with a charger that was simply a block that plugged in and had two small gauge wires/clips.  Not so much as a single indicator light.  Instructions said to charge batteries for 24hrs...not much less....and be careful not much more.  That worked very well for a couple years.  This past spring, I had the bright idea to use my NOCO charger instead...because, well....they're 12V batteries...and it is a genius charger, right?  One battery was shot in a couple months...maybe it was just old and at the end of its life...IDK.      So...my question is:

 

-Can/should I use the NOCO and/or Genius to charge 9Ah SLA batteries?  Better to just use the cheap cord charger that came with?

The maintenance voltage on my Battery Tenders are 13.1 across the board.  They charge at 13.6