Batteries have become very common in our lives, and the applications of batteries such as home appliances and automobiles are very wide. Batteries play a very important role in our lives. We all know that batteries must be replaced when they are used up, and must not be mixed with new and old ones.

Battery has been very common in our lives, and the application range of batteries such as home appliances and automobiles is very wide. Batteries play a very important role in our lives. We all know that batteries must be replaced when they are used up, and must not be mixed with new and old ones.

Since people do not know very much about the use of batteries, there will be more or less mistakes in the use of batteries. For example, the old and new batteries are used in series together, but as everyone knows, this approach will shorten the service life of the new battery.

The new battery has higher terminal voltage and lower internal resistance due to more chemical reaction substances, while the old battery has lower terminal voltage and higher internal resistance. Generally, the internal resistance of a 12V new battery is 0.015-0.018 ohm, and the old battery The internal resistance of the battery is more than 0.085 ohm. If the old and new batteries are used in series, then in the charging state, the charging voltage at both ends of the old battery will be higher than the charging voltage at both ends of the new battery. As a result, the new battery is not fully charged, and the old battery has already passed. In the discharge state, because the capacity of the new battery is larger than that of the old battery, the result is that the old battery is over-discharged, and even the old battery is reversed, and the battery swells and causes side effects. It will deplete the power of the new battery, and it will also cause the voltage inside the appliance to be unstable, and there is also the danger of overuse of the old battery.

The old and new batteries must not be mixed and used. Mixing and matching will not only save electricity, but waste electricity, and the result will not be worth the loss.