Changan Eado Battery Drain Overnight: Finding the Parasitic Draw

Why your Eado’s battery goes flat overnight

If your Changan Eado starts fine after a drive but is dead the next morning, you’re almost certainly dealing with a parasitic electrical draw—something staying awake or drawing current when the car is parked. A healthy Eado should go to sleep within 20–30 minutes and settle around 30–50 mA; a weak or aged battery can make a normal draw look worse, so test the battery and charging system first.

Most likely causes and what to check first

Start simple: battery health, terminal corrosion, alternator charging voltage, and any aftermarket dashcam, tracker, USB charger, or alarm wired to constant power. Then check the easy switches—glovebox, trunk, and interior lights—and door/trunk latch switches that can keep the BCM awake. On the Eado, common culprits include a body control module (BCM) not sleeping, infotainment/head unit staying on, a faulty door lock actuator or latch switch, keyless-entry receiver, and telematics module. Use a multimeter or clamp meter to measure current after full sleep, then do a fuse-pull test to isolate the circuit.

• Check first: battery load test, alternator output, battery terminals, aftermarket electronics.
• Then: dome/trunk/glovebox lights, door and trunk latch switches, BCM, radio, telematics.
• Diagnostic tip: don’t measure immediately—wait for modules to sleep, or you’ll chase a normal wake-up draw.

Is it safe to keep driving?

If the Eado starts and charges normally, it’s usually safe to drive to a workshop—but don’t ignore it. Repeated overnight drains strain the battery, starter, and electronics, and a failing alternator diode or stuck module can leave you stranded. If you see a battery warning light, smell hot wiring, or the car barely starts, stop and get it checked; otherwise, book a parasitic draw test soon.

This material is AI-generated and for informational purposes only — it does not replace an in-person diagnosis by a qualified mechanic.