I bought a used 5-string Hamer Cruise from Guitar Center a year or two ago. I've been gigging with it consistently since then, I love it, it's my favorite bass ever, the neck is fantastic, it sounds great, etc etc. On a whim I decided to check out the electronics cavity and was surprised by what I found. There are 2 batteries in there, 1 in a clip that appears to be stock, the other just kind of laying there with some foam padding surrounding it. They appear to be wired directly into the volume pots. There is no preamp to speak of and the controls work similarly to a passive jazz bass (VVT). No sound comes out if I remove the batteries. Can anyone shed some light on what purpose these serve? I know that some Hamer Cruise basses came with active electronics but I can't find any pics of the electronics cavities to see if this is the stock config. Maybe a previous owner had a preamp in there and then took it out to sell the bass?