VECTOR battery charger 

I'm not driving enough to keep the battery charged. This is the charger I purchased.
The VECTOR Battery Charger and Battery Maintainer, BC15BV, is a charger, maintainer, reconditioner and quick booster that also helps to extend battery life and reverse battery damage. It is designed for 12-Volt lead-acid batteries and is compatible with all AGM/GEL/WET battery systems. The 50 amp engine start gives you a quick boost of power to jump start vehicles in 60 seconds. The Smart Charge feature automatically selects charge rate and adjusts from rapid charge to trickle charge to maximize battery life and compensates for low voltage and temperature extremes. The patented alternator test lets you know when the alternator is operating out of range