request for information

Hello,
I wanted to know if it is normal to wake the price of having to change the batteries every two weeks. It is very easy to use but at the moment I walk batteries manufacturers and this means very dear to me ??? !!!! And yet I do not use the light function so only the ringing 10 seconds use my batteries of all brands and new. Thank you to the seller to give me more information about this article. I have a Casio clock 25 and the batteries will change only every year or even more !!!