How Long Does the Battery of a One-Key Start Key Generally Last?

2 Answers
MacDominic
07/24/25 5:11am
The battery of a one-key start key can last for about two years. The button device and starting method of the one-key start are as follows: Button Device: The one-key start device is part of a smart car. It is a button device designed to simplify the starting process and can also be used to turn off the engine. This device can be modified at the original car key lock position or installed on an independent panel. Starting Method: The starting method is a software-based one-key start. There are three main points to pay attention to when installing a car one-key start system (the wiring of the plug under the ignition switch, the position of the button, and the handling of the steering lock).
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WilliamRose
08/11/25 12:51am
My car key battery usually lasts about two years, but it depends on how you use it. For me, commuting to work every day and pressing the unlock/lock buttons several times shortens the battery life to just over a year. If you drive short distances and press the buttons less, it might last up to three years. Once, the battery died completely, and the car wouldn't start—luckily, I had a spare key at home and didn't get delayed. I recommend checking the dashboard every six months; if the battery warning light appears, it's time for a replacement. New batteries are quite cheap—just a few dollars at the supermarket—and replacing it yourself takes only a minute: pop open the key's back cover, remove the old battery, make sure the positive and negative terminals are aligned correctly, and insert the new one. Weather also plays a big role; summer heat inside the car speeds up battery drain, so don't leave your key in the car under the sun. Developing good habits saves both hassle and money.
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