The amount of power it draws is minuscule.
Unless you are leaving it in for weeks at a time and not driving the car, should not be a problem to leave it as it is.
If you are still worried about flattening y9our battery, use a battery maintainer. Not a bad idea anyway if the car doesn't get driven regularly
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2004 Boxster S 6 speed - DRL relay hack, Polaris AutoTop DIY
2004 996 Targa Tip
Instructor - San Diego region
2014 Porsche Performance Driving School
2020 BMW X3, 2013 Ram 1500, 2016 Cmax, 2004 F-150 "Big Red"
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