I have generic no name auto parts store 2/10/25 amp charger that has a "deep cycle" mode also, which I use to charge my 100 AH battery I use for my remote fence charger on my little orchard ... After that says it's "charged" I then put it on one of my BatteryMINDERS which have a desulfate feature.
I also use the BatteryMINDERS as tricky chargers on both tractors, on my pickup when I bring it home from sitting at my trucking companies terminal for weeks, and also put my generator battery on it once a year
Have a NOCO jump pack too ...