Sennheiser BA 70 Rechargeable Battery Pack

The BA 70 is the rechargeable pack for Sennheiser's Evolution Wireless Digital line, fitting both the EW-D bodypack transmitter and the EW-D SKM-S handheld. At 1.72 Ah and 3.8 V it is sized for a full workday of digital UHF transmission, and it is the battery included in every EW-DX handheld and lavalier set.

Because it fits both the bodypack and the handheld in the EW-D/EW-DX family, one spare battery type covers the whole system, whether a production is running lavalier bodypacks, handheld vocal mics, or a mix of both.