I'm wondering if anyone has used rechargeable batteries in their basses? I have owned a lot of basses that take 9V (PP3) batteries (and several 18V basses that take 2) and I was thinking of trying some rechargeables in a bass (since I am buying some rechargeable 9Vs for my Raven Labs PHA-1). For example, I have heard a lot of people complain that Alembic Series electronics eat up batteries if you don't use the power supply (which can be a pain to use), and I wondered why people don't try some rechargeables. I really have no idea how often people end up having to change batteries in other types of basses, but it seems like a good idea to have a set of rechargeables to swap in and out. I wonder if people might be concerned over battery life or the fact that rechargeables lose charge when sitting around. Since you can get good 9V NiMH batteries for $6 and a charger for $30, it seems like a good idea, and you get the added (or perhaps major) bonus of not throwing out all of those toxic batteries.