
It is best not to place the battery inside the car to avoid short-circuiting. The following items are prohibited from being placed in the car: 1. Flammable and explosive items: When parking in an open space for a long time, the sun directly shines on the vehicle, causing the temperature inside to rise sharply. Placing flammable or explosive items inside the car is quite dangerous. To ensure vehicle safety during summer, avoid placing items such as power banks, pressurized containers, carbonated drinks, perfumes, and lighters inside the car. 2. Interior decorations: Hanging decorations inside the car, especially hard glass items, can obstruct the driver's view, creating blind spots while driving and compromising safety. In the event of sudden braking during an emergency, accidentally hitting the head on these decorations can have severe consequences, posing a risk to life safety.

I think we need to be cautious about this because I've driven many cars and seen some friends who just put the battery directly in the car, which ended up causing problems. The temperature inside the car fluctuates a lot, and during the high heat of summer, the battery can easily leak or release harmful gases, even causing a fire—that's way too dangerous. Especially the trunk, which can get as hot as a steamer. If the battery gets damaged from bumps and the acid leaks out, it could not only ruin the interior but also poison you. My suggestion is, if you really need a spare battery, it's better to keep it in a cool, well-ventilated place at home, like a corner of the garage, or buy a dedicated battery box to secure it. If you absolutely must keep it in the car, only do so for short-term emergencies, and choose a spot without direct sunlight to secure it. But don’t forget to regularly check the battery’s condition to ensure safety comes first.

As someone who frequently drives around, I have to say it's fine for short-term emergencies, like carrying a battery for tire changes during trips, but storing it in the car long-term is a no-go. When the car heats up, the risk of battery expansion increases. I once left a battery on the back seat, and by summer, I could smell acid, forcing me to dispose of it immediately. Nowadays, newer batteries like lithium ones are even more prone to overheating, so I've switched to using portable power banks instead of spare batteries. My advice is to wrap the battery in insulating material if you must keep it in the car, avoiding contact with metal parts, or better yet, don't store it there at all—find a cool, shaded spot instead. The key is to think carefully about the consequences before taking action; don't prioritize convenience over potential trouble.

I'm concerned about safety, so I never recommend storing batteries in the car. Once, my husband wanted to keep a spare battery in the back of the car, and I immediately stopped him because high temperatures inside the car could cause the battery to leak or catch fire. If a child or pet gets hurt, it would be too late. It's safest to store them in the garage or a well-ventilated area at home. If you must keep them in the car, choose a fixed spot and wrap them tightly in a bag. Remember, health comes first—don't risk saving money.


