Sennheiser BA 70 - rechargeable battery pack

The Sennheiser BA 70 is a rechargeable battery pack for Evolution Wireless Digital transmitters. It replaces standard alkaline batteries in both handheld and bodypack units. Using lithium-ion technology, the pack provides consistent voltage throughout a performance, even in demanding live sound environments. It fits directly into the transmitter’s battery compartment.

Designed for frequent use, the unit is built to withstand professional production environments. It is easy to swap, allowing for quick changes between sets. Measuring 62 mm by 37 mm by 77 mm and weighing 57 g, it does not noticeably alter the balance of the handheld or bodypack equipment. Using a rechargeable battery reduces long-term costs and waste compared to alkaline cells. Units are sold individually to allow for flexible backup planning.

• Lithium-ion technology: Offers a high energy-to-weight ratio and no memory effect.
• 12-hour runtime: Provides enough power for full-day production schedules or multiple sets.
• Sennheiser L 70 charger compatibility: The pack can be recharged via standard USB power sources.
• Broad compatibility: Fits EW-D SK and SKM-S series bodypack and handheld transmitters.
• Direct replacement: Fits the existing battery compartment without requiring any modifications to the microphone body.