+1 on that recommendation. I learned that lesson the hard way unfortunately. But I have since replaced the battery tender with the Optimate 4 Dual Program unit.I actively tell people to avoid the Battery Tender brand. They are maintenance chargers and even the big one is barely able to charge a dead battery. I do recommend the Accumate or Optimate brand chargers.
They have a model that charges in the 1.2-120Ah range. Is that low enough?Except it says right in that sales blurb that it's not designed for our bikes. It says 14ah minimum which tells me it will not charge at a low enough rate to maintain our batteries correctly once they are charged.