Do car batteries with a life of 45% need to be replaced?

It needs to be replaced. Generally speaking, the battery capacity is very important for cars. If the power is around 45%, it is recommended that the owner replace the battery in time. This is because the low battery can easily cause the vehicle to fail to catch fire and can't supply power to the electronic components on the vehicle, so in this case, it will affect the use of the vehicle.

How to judge whether the battery should be replaced?

1, car starting difficulty:

If the vehicle can't catch fire or can't start until it is ignited for 5 or 6 times, it is likely that the battery is low. It is necessary to check the battery as soon as possible and replace it in time.

2. The brightness of the headlights darkens:

If the headlights are dimmed when the car is driving at night, it is very likely that the battery will be exhausted soon, so we need to go to the 4S shop and repair shop to check whether it is a battery problem. If the battery is low, we need to replace it in time, otherwise it will affect the driving safety.

3. Battery alarm lamp:

If the battery alarm light on the dashboard lights up during driving, you need to park in a safe place and check the battery in time. Most of the reasons leading to the battery alarm light are because the battery has problems, and the owner needs to go to the 4S shop to replace the battery in time.

The service life of a battery is generally 3 to 5 years. Car owners should regularly maintain their batteries and develop good driving habits. Before leaving the vehicle, check whether the engine is turned off and whether the air conditioner and headlights on the vehicle are turned off.