What is the difference between a 12V battery and a 20V battery?
2 Answers
The differences between a 12V battery and a 20V battery are as follows: 1. Functional difference: A 12Ah battery means it can discharge at 10A current for 1.2 hours or at 6A current. A 20Ah battery means it can discharge at 10A current for 2 hours. 2. Appearance: The height of a 12Ah battery is about 100mm, while the height of a 20Ah battery is about 180mm. Additional information (selection method): 1. Check if the product labels on the electric vehicle battery are complete. This includes the manufacturer's name, product model, manufacturing date, and trademark; verify if the internal and external labels are consistent, especially checking if the product has clear markings and the production date. 2. Pay attention to the appearance of the electric vehicle battery. Look for any deformities, cracks, scratches, or signs of leakage. The battery terminals should be clean, free of rust, and the markings should be clear. 3. Focus on the rated capacity labeled on the electric vehicle battery. The higher the rated capacity, the longer the battery discharge time. It is best not to purchase a battery without a rated capacity label, but also ensure it is specifically designed for electric vehicles.
Last time I helped my neighbor uncle replace the battery, I encountered this issue. Car batteries are almost universally 12 volts—this voltage serves as the baseline for the entire vehicle's electrical system. Devices in your car like the radio, headlights, and cigarette lighter are all designed to operate around 12 volts. If you were to install a 20-volt battery, at best you'd blow a fuse, and at worst you'd fry the ECU—repairs would be painfully expensive. Jet skis and power tools use 20-volt battery packs, which are designed with multiple lithium cells in series. Once at the auto parts market, I saw someone mistakenly install a power tool battery into an old Santana—it started smoking the moment they turned the key, and the entire wiring harness had to be replaced.
