Why does the Haval Big Dog lose power after being parked for a few days?
2 Answers
Reasons why the Haval Big Dog loses power after being parked for a few days: 1. The internal plates of the battery have fallen off, causing severe self-discharge. The battery cannot be left unused for long periods, so a new battery needs to be replaced in this case; 2. The vehicle's discharge current is too high when in a dormant state. The Haval Big Dog is a compact SUV under the Great Wall Motors brand. Taking the 2021 Haval Big Dog 2.0T DCT 2WD Chinese Hunting Dog Edition as an example, it features a 5-door, 5-seat structure with a fuel tank capacity of 61 liters. In terms of power, the 2021 Haval Big Dog 2.0T DCT 2WD Chinese Hunting Dog Edition is equipped with a 2.0L inline four-cylinder turbocharged engine, with an aluminum alloy structure, delivering a maximum power of 155 kW and a maximum torque of 325 Nm, paired with a 7-speed dual-clutch transmission.
I also experienced my Haval Big Dog's battery dying after parking for a few days, which was really annoying. That time my car sat for a week, and the engine wouldn't even turn over when I tried to start it, so I had to call roadside assistance in a panic. The reason might be that the car's electrical systems weren't completely shut off, like the anti-theft system or Bluetooth module quietly draining power in the background, combined with the battery itself aging and losing capacity. I think the first thing to check is whether interior lights were left on—lights in the trunk or from doors left ajar can also continuously discharge the battery. It's recommended to regularly drive for at least 30 minutes to recharge the battery, especially if you frequently take short trips. If this keeps happening, use a multimeter to measure the quiescent current; it should normally be below 50 milliamps—if it's higher, it indicates a circuit leakage. In short, don't ignore this small issue—get it checked at a 4S shop promptly, or you'll end up spending more on a battery replacement later. For safety, you can also disconnect the negative terminal before long-term parking.
