12AH and 20AH represent battery capacity, and the larger the capacity, the more storage capacity. At present, electric vehicles have lead-acid batteries and lithium batteries! The capacities of lead-acid batteries are 12AH, 14AH, 20AH, 24Ah! The capacity of lithium batteries is not necessarily, because lithium batteries can be arbitrarily combined to obtain large-capacity batteries such as 48V40Ah and 72V80Ah.
Extended data:
Battery purchase 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.
References:
Baidu encyclopedia-electric vehicle battery