How to Measure the Condition of a Car Battery?

[BennettMarie]

Methods for measuring the condition of an electric car battery are as follows: 1. Judging by the external packaging of the battery: (1) Check if the outer packaging is damaged or has been opened. (2) Inspect the appearance of the battery itself for any scratches or rust on the positive and negative terminal connections. (3) Check if there is an anti-counterfeit label on the battery casing, whether the production date is relatively old, if the manufacturer's information and markings are complete, and if the writing is clear and legible. 2. Testing the battery's quality during a trial run—install the freshly charged battery onto the electric vehicle, start the vehicle's power, and suddenly accelerate while riding to observe the changes in the power gauge needle: (1) If the needle drops less than half a division during acceleration, the battery is judged to be new or in good condition. (2) If the needle drops by 1 or even 2 divisions during acceleration, the battery is judged to be old or of poor quality. (3) If the needle drops by 3 or even 4 divisions during acceleration, the battery is judged to be a refurbished product from a scrapped battery masquerading as new, indicating extremely poor quality.