Did you buy the Ute new?
If not did the previous owner fit any electrical accessories or upgrade the audio system with an extra amplifier?
If there are no parasitic electrical loads draining the battery, maybe the new battery you got was not as new as you thought it was.
Sometimes batteries can sit in stock for long periods in small turnover outlets.
I would suggest getting one of these chargers to maintain and recondition your battery.
It will automatically analyse it's condition and select the right conditioning or charging cycle.....
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