Ok, it's time to test your eco-friendliness (I know this is quite relative)! Do you buy the more expensive rechargeable 9V batteries (and a recharger) for your active bass or do you use the disposable ones? At home I usually have the opportunity to recharge but on the road it's pretty hard to find a suitable power outlet, especially when outside Europe. Then it comes down to buy a disposable battery. How do you deal with it?