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Why does a newly replaced battery not last long?

2 Answers

SanLila

08/28/25 7:41am

Newly replaced battery not lasting long can be attributed to the following reasons: Battery quality issues: When replacing the battery, it is essential not to opt for cheap options but to choose reliable manufacturers. Charger malfunction: If you suspect the charger has an undercharging issue, you can first charge it until the indicator light changes, then continue charging with a normal charger. If charging can proceed, it can be confirmed that there is an undercharging fault. Motor aging: High power consumption in electric vehicles due to aging motors, poor controller compatibility, or excessive running resistance is also a major reason for the short range. Replacing the aging parts can resolve the issue.

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HarleyLee

09/10/25 5:53am

Last time I replaced my car battery with a new one, but it wouldn't start after just a few days, which was quite puzzling. After checking for a long time, I found out the battery might have been a refurbished one with aged electrode plates and insufficient capacity - nothing like a new battery at all. Ordinary car owners need to keep their eyes open when buying batteries, choose reputable brand stores, and don't go for cheap options. Also, it's best to have the seller test the battery's charge before installation to avoid problems. If a new battery has been in factory storage for too long, sulfation can cause high internal resistance, leaving it dead after one night. Regularly check the fluid level and top up with distilled water in time, while avoiding parking in overheated environments. In short, if a new battery doesn't last long, it's not necessarily the car's fault - more likely it's poor battery quality. Spending a bit more on a good brand can save you a lot of trouble.

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