In the market, there are two brands of batteries of the same model  The price of the battery of brand A is 10% lower than that of brand B, and the former sells better than the latter  But the testing shows that the service life of the battery of brand B is 15% longer than that of brand A, but brand A sells better  The reason is that consumers do not know the difference in service life between the two batteries  In this way, in a competitive market, inefficient products that should have been produced less are produced more
This shows that incomplete information can lead to market failure
The manufacturer should indicate the composition, function and production date of the product on its label.