The BA 10 from Sennheiser is a rechargeable battery pack for the evolution wireless SKM D1 or AVX Handheld Transmitter (sold separately). It can be used to replace the two AA size batteries that power the transmitter-unit. The BA 10 uses a lithium-ion 3.7V rechargeable battery.
Rechargeable battery pack for the evolution wireless SKM D1 or AVX Handheld Transmitter (sold separately)
Can be used to replace the two AA size batteries that power the transmitter-unit
BA 10 uses a lithium-ion 3.7V rechargeable battery