hello!! who ever is reading this. I have an issue with my sub musicman bass. i bought it on december 2014 and everything was cool for about one year approximately, but then the battery of my bass started to drain more fast than the usual, and i now that you have to use industrial batteries when working with active basses in order to be more efficient, but the problem is that before this happened, the battery (the common ones) used to work like for three months more or less, now it only last like a month. does any body know what it is going on or what can i do?