Battery-eating Argonaut 2

[H. Hoover III]

My Argo 2 (TT 535) has started to eat batteries - the most recently 
installed one lasted only 5 months where-as the first one was good for 
nearly 3 years. 

    Question #1: has anyone else run into this problem?; and,

    Question #2: if so, how did you cure it (other than feeding it more 
        batteries) ??  

    A contact with the TT Service department yielded the comments:
        "Jeez - oughta last longer than that!. Mebbe it's a leaky 
        cap or sumpin...."  ... sigh

    Any suggestions gratefully received ..

de Pete, W6ZH