There have been numerous discussions regarding battery questions or of longevity. I purchased a new 2013 Dodge Challenger. Mileage is 1679. During the five (5) years, I have started the vehicle every two (2) weeks at idle (parked) for twenty (20) minutes. Every six (6) months, I schedule the vehicle to be serviced for an oil change. Trip mileage is about ninety (90) miles. There have been no issues at all in terms of battery failure and 'no' battery tender or charger is ever used. Each and every time the car starts with no hesitation, none. Any and all input regarding the aforesaid is appreciated. Please post your thoughts or direction relating to the process I have undertaken. This has been a research test on my part, yet to be challenged.