The rechargeable bodypack transmitter has high-efficiency circuitry design. The included single rechargeable lithium battery can be easily removed or interchanged for charging. The intelligent battery charger maintains a high charge capacity for up to 600 charge cycles for cost saving and is environmentally friendly. The innovatively designed battery cover allows easy access to operate buttons and prevents accidental operation. It can directly match to high-low input impedance for microphone or guitar without switching.