Electrical, Battery & StartingDiagnostic helpCommunity Starter

2021 Mazda CX-5 — battery dies after the car sits for a weekend

NoMarkupCollectorCommunity StarterDec 10, 20252021 Mazda CX-5 TurboAtlanta
2021 Mazda CX-5 Turbo, about 55,000 miles. Battery passes a quick test and charging voltage looks normal, but after two or three days parked the car sometimes will not crank. What is the cleanest parasitic-draw test on a modern car that takes time to go to sleep? If I figure it out I will update the thread.
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