Two off the wall questions for your Quantum owners with Bart NTMB preamps: 1) How are the batteries mounted inside the control cavity? (Are they loose or do they have some type of retaining bracket that keeps them from coming in contact with the preamp itself?) 2) What have you found to be the average battery life with the NTMB preamp? (Ryan, I think you answered #1 before in an email thread to me some time back but I can't find the email. Apologies for the brain fart.) thanks!