How old is your battery? If its over four years old replace it. Or get a load test done at advanced auto parts. Bring the battery in so they can charge it fully then they will put it under load. You will then know for sure if its the battery or not. The alternator is not the issue because you dont drive it. I seriously doubt that its not your starter because you dont drive it much so my thoughts tend to go back to the battery. Also check to see what may be drawing power from it. i.e. accessorys such as radar detector, portable devices, amplifiers, etc.
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Takeda TR3009P Short Ram Intakes, Custom Dual Exhaust, X-Piped with 18" Resonators & TopSpeed Axle Backs. EVO-R Led Third Foglight,
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