I am using an ECM-719 microphone to record with my mz-m200. The instructions say to use the following type of battery: SR-44. I have found it difficult to find this battery but have found an LR-44 which fits in the mic just fine. Is this an acceptable replacement battery? The other thing is that when I put the battery in the microphone, I find that the light is dimly illuminated even when the mic is in the OFF Position. Is this normal? It seems to me that it is always on if the battery is placed inside the microphone, regardless of its ON/OFF position. Any help would be Appreciated!