Does a battery with 20% life need to be replaced?

[RowanMarie]

Car battery with 20% life needs to be replaced. Car battery: The battery is an important component of a car. When the engine is not started, the battery supplies power to all the electronic devices in the car. The battery is also responsible for starting the engine. Without it, the engine cannot start. A car battery, also known as a storage battery, is a type of battery. Its working principle is to convert chemical energy into electrical energy. Car batteries are divided into conventional batteries, dry-charged batteries, and maintenance-free batteries. Hazards of not replacing the battery: Affects the brightness of headlights and the sound of the horn, impacting safety, damaging vehicle electronics, losing computer data, inability to start, and breakdown on the road.

[HarmonyLee]

I think the battery life is only 20% left, which is indeed a signal that needs attention. In cars, the battery is mainly used to start the engine, and having around 20% left usually means the capacity is already very low. Starting the engine may become difficult, especially in cold winter temperatures when it's prone to failing to ignite. I've encountered a similar situation before when driving—I delayed replacing it until it was down to 10%, and once when I was rushing to the airport, the car broke down, costing me more money for a tow truck. I recommend not saving on this small expense. Use a simple testing tool to check the voltage regularly. If it drops below 12V, it's better to replace the battery as soon as possible to avoid unexpected breakdowns that could disrupt travel plans and safety. Also, pay attention to minimizing short trips and turning off headlights to protect the battery, which can help extend its life by a few more months.

[EmilianoMarie]

Regarding the issue of a battery at 20% lifespan, I believe it's best to take it seriously. As a frequent long-distance driver, I understand how troublesome it can be when the battery fails at a critical moment, such as breaking down on the highway on a rainy night—not only dangerous but also wasting half a day. The so-called 20% remaining indicates severe battery aging, where unstable current during engine startup might cause issues with other components. I advise against taking risks by waiting until it completely fails. Instead, visit a professional shop for a quick test. If you notice increased startup attempts or a warning light on the dashboard, replace the battery immediately. Spending a few hundred dollars for peace of mind is worth it. Also, develop a habit of checking the terminals monthly for looseness or corrosion to reduce unexpected risks.

[DelKira]

My car battery showed 25% charge last time, and I thought it would last for a while. But a month later, it completely died and couldn't start, causing me to be late for work and get scolded by my boss. Experience tells me it's best not to hesitate and just replace it when it reaches 20%. At this point, the battery is like an old buddy about to retire—especially prone to failing in cold weather or after long periods of inactivity, leading to costly emergency calls. The replacement process is simple; you can even do it yourself. Just buy a good-quality new battery, get a knowledgeable friend to help, and it can be replaced in under 20 minutes. Prevention is always cheaper and less stressful than repairs.

[DiJune]

When the battery is down to 20% of its lifespan, I think it's better to replace it immediately—prevention is better than cure. With so little capacity left, starting the vehicle will become noticeably harder, and it might even cause malfunctions in onboard electronics like lights and audio systems, compromising driving safety. Once, I ignored it until it dropped to 15%, and suddenly my car broke down in the rain—luckily nothing serious happened. My advice is not to delay and get a new one. A new battery only costs a few hundred bucks, which is far cheaper than the thousands you might spend on repairs or towing after a breakdown. Also, check the charging system, like whether the alternator is working properly, so the new battery lasts longer. Remember, regular maintenance is the first line of defense for safety.