1, compared with ordinary batteries. For example, the mileage is obviously shortened, indicating that there is something wrong with the battery.
2. When the battery charge is less than half, it is obvious whether the performance of the battery will decline. As long as compared with the normal situation, if the power drops too fast, it also indicates that there is a problem.
3. If you have a multimeter, you can support the rear wheel when the power is less than half, and measure the voltage of each battery when the speed reaches the fastest. If the voltage is extremely low, it is bad.
Coiling method
1, check whether the product identification of electric vehicle battery is complete. Including the manufacturer's name, product specification and model, manufacturing date and trademark; Check whether the internal and external signs are consistent, especially whether the product itself has eye-catching signs and production dates. ?
2. Pay attention to the appearance of electric vehicle battery. Check for deformation, cracks, scratches and leakage marks. The battery terminals shall be clean and free from rust, and the signs shall be clear.
3. Pay attention to the rated capacity marked on the battery products of electric vehicles. The larger the rated capacity of the battery, the longer the battery discharge time. It is best not to buy batteries without rated capacity, but pay attention to whether they are special for electric vehicles.
4. Buy brand batteries from well-known enterprises and large enterprises. Batteries are generally provided by professional battery manufacturers. Different brands and manufacturers produce different batteries with different quality and different prices. Well-known large enterprises have large scale, strong technology, good after-sales service and guaranteed battery quality.
5. Choose an automatic control smart charger that matches the battery. A suitable charger can automatically adjust the charging size and time, which is beneficial to prolong the service life of the battery.
Refer to the above content: Baidu Encyclopedia-Electric Vehicle Battery