Posted on 7/30/2025
Waking up to a dead battery can ruin your day, especially when it happens more than once. If your vehicle starts fine during the day but won’t turn over the next morning, your battery may be draining while the car sits. This can happen for several reasons, and identifying the root cause is key to preventing further inconvenience or damage. Let’s explore the most common causes of overnight battery drain and what steps you can take to fix the problem for good. How Your Battery Works Your car’s battery supplies electrical power to start the engine and operate essential systems when the engine isn’t running. Once the engine is on, the alternator takes over and recharges the battery. But even when your car is off, some components draw a small amount of power. This is called a “parasitic draw,” and it’s normal to some extent. However, when that draw becomes excessive or something fails to shut off properly, your battery can drain ... read more