Do Car Batteries Have An Expiration Date. The expiration date is usually the date past which the manufacturer will not guarantee that full life is left. Whilst the brand of the battery may matter the greatest concern for the car owner who needs a new battery should be the production date.
This is how you can tell the age of your battery. I came across some batteries that were at their expiration dates so I decided to run some tests to see how they fared. In the case of button cell batteries many of them will have it on their box or plastic packaging but will almost never actually be on the battery.
To find the Best If Used By BIUB date of the batteries in question please look on the uppermost section of the cells near the battery.
Therefore a new 40kWh battery in 2016 would have. Therefore a new 40kWh battery in 2016 would have. Car batteries can keep their charge for 2 months or more without running but the exact time depends on the strength of your battery and the draw of your car. Mostly how long they last is on how you treat them.
