How to choose a car battery for operation up to minus 30 degrees in winter and plus 30 degrees in summer. We buy in a store or take an old one with no guarantees. My practice shows that you can choose a good battery. We need a proven good battery.
Serviced or non-serviced car batteries have the same electrical performance. In this case, I will describe how to choose 6st55. The life of the battery begins as soon as it is filled with electrolyte. After filling in the battery, the self-discharge process takes place and is equal to two percent per month of its capacity. Therefore, the year of issue must be fresh.
The main factors are instrument measurements. In specialized stores, the sales assistant has all the appliances. Therefore, be sure to ask to measure the battery with instruments. First, you need to measure the voltage in volts, where the device should show 12, 72 volts. Pay attention 12 point volts and 72 hundredths of a volt exactly hundredths show that the battery is one hundred percent charged. An open circuit voltage or no-load is 12.72 volts is a good indicator.
The next step is to measure the battery with a load plug. The load plug generates a current equal to the starter current and at the same time shows the voltage. The device on the load plug should show at least 11, 5 volts - the battery is good. If less than 10 volts - do not take.
The main thing to remember is the open circuit voltage of 12, 72 volts. Where when starting the car at the battery terminals at least 11, 5 volts.
There remains one more step to inspect the battery for cracks, scratches, various dents on the case. The battery must be dry on all sides. If you take an old battery, then the electrolyte must be clean, if the electrolyte is dark or dirty - this will let you down on the road. Perhaps the most important thing is to observe safety precautions when working with electrolyte.
