Chery Arrizo 5 Battery Drains Overnight? Find the Parasitic Draw

If your Chery Arrizo 5 keeps waking up with a flat battery, you are not imagining it. A parasitic draw means something is still sipping current after the car should have gone to sleep. In most cases the culprit is small - a stuck light, an aftermarket dash cam, or a module that refuses to power down - but it can also be the alternator, a relay, or the body control module.

Likely causes and what to check first

Before chasing fuses, test the battery and charging system. A weak battery can self-discharge or fail a load test and look like a draw. Once the battery is known-good, measure current draw at the negative terminal after the Arrizo has been locked and left undisturbed for 30-60 minutes. A healthy car often settles below 50 mA (0.050 A); a consistent higher reading confirms a parasitic draw.

• Aftermarket electronics: dash cams, GPS trackers, alarms, amplifiers, phone chargers, and non-standard radios are the most common offenders.
• Lights and switches: glovebox, trunk, vanity mirror, door latch, hood, and interior light switches that stay closed or leak current.
• Alternator diode: a failed rectifier can drain the battery through the charging circuit even with the key off.
• Modules and relays: body control module (BCM), infotainment head unit, keyless entry/immobilizer receiver, CAN gateway, and stuck relays can keep the network awake.
• Battery current sensor: if fitted, a faulty sensor can confuse the charging strategy and leave the battery undercharged.

Is it safe to keep driving?

If the car starts, the charging warning light is off, and the battery is being charged while running, you can usually drive it to a workshop for a proper draw test. But do not treat it as a permanent fix. Every overnight drain deep-cycles the battery, shortens its life, and can leave you stranded. Stop driving and get help immediately if you smell burning, see smoke, notice hot cables, or have warning lights for charging or electrical faults.

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