I have a Battery Minder as well. I recommend it, but it does seem to have one shortcoming. It doesn't want to recharge a dead battery. It will charge for a time, then kick out of its cycle. You could try this several times to get enough charge in the battery for it to do its thing. I have taken to bulk charge on an older 10a charger for a few hours to get the state of charge up to a reasonable level, then switch to the Battery Minder to top it up and desulphate. I rotate 3 batteries on it for a week at a time each to keep them maintained and topped up.
It brought back a FLA that someone had thrown out as dead.
2003 Tacoma V6 4x4 TRD ExtraCab
Tuff Country 5" Lift, King Coilovers, 33x10.50R15 BFG MT's, Black Steelies, Viair 450C Air Compressor and Tank, Custom Swaybar Disconnects, Yaesu FT-857D All Band Amateur Radio, Aerocover Bed Cover, K&N Filter, Dual Batteries, LED Rocklights, Custom Sliders, Engel Fridge
Deck Plate, Gray Wire, Rear Shock Spacer, Two-Low, Free Alarm Mods
Member Cal4Wheel, Tierra Del Sol 4WD Club