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.
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So grateful for B&H's quick service. The base of one of my batteries broke (it happens...sigh) and as soon as I submitted the order for a replacement the B&H team prepared and shipped the product asap. It arrived as expected and I am a fully operational battle station again!!!
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