Considering Rechargeable Batteries Over Disposeable.
We highly recommend using rechargeable batteries like Tenavolts for your ToneWoodAmp. They offer the longest playing time, fastest charging (2 hours), and provide 150% more playing time than alkaline batteries. Unlike disposable batteries, Tenavolts maintain a constant 1.5 volts without power degradation. You can order them from Amazon here: Tenavolts Rechargeable AA Batteries. Another reliable option is the Panasonic Eneloop Pro 2450mAh.