EV Battery Can Drain if the Door Is Left Open
Recently, the trend of electric car rentals has been growing rapidly. Many people prefer EVs because they are quiet, modern, and help save on energy costs. Whether you are using a Rental Car for daily commuting or booking a Car Rental Bangkok service for a short trip, electric vehicles are becoming a popular option.
However, there is a small habit many people overlook: leaving the car door open for too long. It may sound harmless, but surprisingly, forgetting to close the door could leave a vehicle worth millions completely unresponsive, sometimes requiring professional assistance.
Why Can Leaving the Door Open Drain the Battery?
You might wonder, “The EV battery is huge, how could it possibly run out?”
The truth is, the battery that drains is not the main high-voltage battery, but the 12V auxiliary battery. This smaller battery controls the car’s starting system, display screens, sensors, and other electronic components.
When the car door is left open, the vehicle’s computer system assumes you are about to start driving. As a result, it activates systems such as the infotainment screen, interior lighting, and various sensors. These systems draw power from the 12V battery.
This situation can happen whether you are using your personal EV or a Car Rental vehicle while traveling around the city.
Even a Full Main Battery Won’t Help
Here is the surprising part. In many EV models, once the vehicle is turned off, the system disconnects the main battery for safety reasons. Because of this, the large battery cannot supply power to the smaller 12V battery.
If the door remains open for 15–20 minutes, the 12V battery may become too weak to start the system. The result is a completely dark screen and a car that does not respond at all even if the main battery still shows 100% charge.
This can be particularly inconvenient if you are traveling using a Car Rental Bangkok service or exploring the city with a Van Rental Bangkok option for a family trip.
Simple Ways to Prevent the Problem
If you are considering using an EV through a Car Rental Bangkok provider or simply renting a Rental Car for everyday travel, here are a few easy tips to keep the vehicle running smoothly:
1. Always Close the Door
Whether you are cleaning the car or loading items, avoid leaving the door open longer than necessary.
2. Check the Mobile App
Many modern EVs send notifications through smartphone apps if the door is left open.
3. Monitor the 12V Battery
If the vehicle’s screen starts slowly or behaves unusually, it may indicate that the small battery is weakening.
If you are still unsure whether your driving habits suit an electric vehicle, choosing a long-term Rental Car service can be a great solution. It allows you to learn how EVs work in real-life situations without worrying about maintenance costs.
For people working in the city who want to experience new technology, using a Car Rental Bangkok service for a trial period is a convenient way to explore EV driving. You can even consider a Van Rental Bangkok option if you need extra space for family or group travel.
Switching to an EV is not difficult. It simply requires small adjustments in driving habits to get the most efficient and enjoyable experience.
Head Office Don Mueang Car Rental
Located at 279/57 Vibhavadi Rangsit Road, Sanambin Subdistrict, Don Mueang District, Bangkok 10210
Opening hours 0800 – 2000 hours Everyday
Call center 02 – 002 – 4606
092-284-8660 / 090-638-4888 / 086-993-3082
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Email : info@thairentecocar.com
WhatsApp : 0869933082
Siam Commercial Bank
Account number : 605-2588466
Account name : Thai Rent Eco Car Co., Ltd.
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Siam Commercial Bank Public Company Limited, Ongkharak Branch
Category : Bank
Address 439 Moo 1, Rangsit-Nakhon Nayok Road, Ongkharak Subdistrict, Ongkharak District Nakhon Nayok Province 26120 Telephone 037-381-258
Thai Rent Eco Car Co., Ltd. Head Office Taxpayer No. 0105556003679 No. 279/57 Grand I Design Village Vibhavadi Rangsit Road, Sanam Bin Subdistrict Don Mueang District, Bangkok 10210
Call 02-0024606
Vibhavadi Rangsit Road
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