so ive had this 15n (T32b)for 6 months or so. was all dead and parameters gone when i got it ,plus a bad board in the panel. once i fixed all that, all was good. made a few parts. etc. most recently it sat for 2 months. i fired it up other day and im back to square one. params all gone again. i reinitialized and got back going and all is good , but WHY did it lose memory in only 2 months? are there more than the one battery i see in left of cabinet with 3.6 V? that battery still tests out at 3.75V by the way. i just want to find the cause of whatever is causing this,as i do not wish to have to go through setting tools and cutting conditons all over again for a 3rd time . lol