This time of year is hard on batteries.
New technology has made car, truck, RV, motorcycle, ATV and snowmobile batteries more reliable and much easier to maintain. But the cold months of winter will inevitably reduce the cranking amps of any type of battery- gel, AGM, Li-Ion, etc.
Fortunately battery charger technology has kept pace with all these new-fangled batteries. But the wrong charger will kill a high dollar battery in a matter of minutes. Inexpensive float chargers are only suitable for your old school lead-acid battery.