Why is the newly replaced battery still not durable?

[DiElijah]

There are two reasons why the newly replaced battery is not durable: motor issues or battery issues. More details are as follows: Motor issues: The longer the motor is used, the weaker the magnetic effect inside the motor becomes, leading to demagnetization of the motor. Once the motor is demagnetized, both speed and power will decrease during use. Even with a new battery, it cannot perform as well as the old one. This is a problem related to the aging of electric vehicle components and has nothing to do with the battery itself. It is a normal situation, so there is no need to suspect that the newly installed battery is of poor quality. Battery issues: As loyal users of electric vehicles, many owners will notice that current electric vehicle batteries are not as durable as before. In fact, this is normal. Electric vehicle batteries have undergone "weight reduction and cadmium-free" treatments, which have reduced their durability. In the past, batteries could last up to 10 years, but now they generally last only 2 years, and some may not even last 2 years.

[VonCody]

I often encounter situations where a newly replaced battery runs out of power quickly, mostly due to issues with the charging system. For example, the alternator might be broken and not charging, or a faulty voltage regulator could cause the battery to not charge sufficiently. If the positive and negative terminals aren't cleaned properly during installation, corroded connections can hinder current flow. Additionally, some new batteries might be of poor quality—I've seen cheap batteries lacking sufficient electrolyte right from the factory, failing to meet standards. Driving habits also play a role; frequently taking short trips prevents the battery from fully charging, and after a few deep discharges, its lifespan plummets. After replacing the battery, it's advisable to immediately check if the vehicle's operating voltage stabilizes between 13.5 to 14.5 volts. If not, a professional inspection of the charging circuit is recommended. Don’t overlook these small issues—otherwise, you might not only waste money but also risk a breakdown in the middle of the night.

[RobertMarie]

I've encountered this issue myself. The brand-new battery I just replaced died within two weeks, and later troubleshooting revealed that the trunk light was stuck and not fully turned off, continuously draining the battery overnight. Modern cars are equipped with numerous electronic devices like dash cams, which can secretly consume power after the engine is off, draining a new battery. If you mostly drive short distances, the battery doesn't have enough time to fully recharge. My weekly commute of just a few kilometers resulted in constant battery drain. Now, I make a point to take a long drive every couple of days to recharge the battery and double-check that all lights are turned off. Battery lifespan is closely tied to daily maintenance, and regularly cleaning surface dust to prevent corrosion is also crucial. These small adjustments have significantly extended the life of my new battery.

[DiBrody]

For those who frequently drive short distances to work, the new battery may not last long due to frequent starts without sufficient charging time. My car has navigation and Bluetooth devices, which continue to consume power after the engine is turned off, draining the battery even faster. Large temperature fluctuations, such as summer heat accelerating aging or winter cold reducing efficiency, also shorten battery life. It is recommended to plan routes to increase driving time or add solar charging patches to maintain voltage. Driving habits play a dominant role in battery durability.