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How to resolve the low battery alarm for ETC?

2 Answers
VonLayla
07/29/25 8:37am
Methods to resolve the low battery alarm for ETC: Place it under strong sunlight for charging and then observe. If the low battery alert no longer appears, it indicates the device is fully charged. If the alert persists, the card reader might be damaged, requiring contacting customer service for repair or replacement. Since the ETC card reader is equipped with a solar panel, when installed on the vehicle's front windshield, the solar panel faces outward to charge the built-in battery of the ETC card reader. Vehicles using ETC should maintain a speed below 20 km/h when passing through non-stop toll lanes. When passing through ETC lanes, avoid using mobile phones or other high-radiation, high-interference electronic devices. Once the electronic tag is installed, it must not be removed without authorization.
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Brianna
08/11/25 6:12pm
I remember once when I was driving on a long-distance highway, my ETC device suddenly gave a low battery alarm, beeping incessantly and making me nervous. To deal with this issue, the first step is to pull over safely. Usually, it's because the coin cell battery, like the common CR2032 model, is out of power. I took out a new battery to replace it: first, locate the back cover or battery slot of the device, gently pry it open, remove the old battery (making sure not to lose any small parts), then insert the new battery with the positive side facing up. After closing the cover, the device will automatically reboot, and the alarm sound will stop within seconds. If you're unsure about the battery type, check the manual or contact the ETC service hotline for guidance. The device can still be used during the alarm, but it's best to address the issue as soon as possible to avoid actual power loss, which could affect passing through toll stations or lead to overcharging. I recommend replacing the battery every six months as a preventive measure. Also, avoid exposing the device to high temperatures—direct sunlight drains the battery faster and shortens its lifespan.
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