Sennheiser BA 70 Rechargeable Battery Pack for EW-D, EW-DX & EW-DP
Sennheiser BA 70 Rechargeable Battery Pack The Sennheiser BA 70 Rechargeable Battery Pack is a 1720 mAh lithium-ion power source for compatible Evolution Wireless Digital equipment. With a nominal 3.8 V output and reusable design, it replaces disposable AA batteries in supported EW-D, EW-DX, and EW-DP components while providing predictable runtime for professional wireless audio applications. For live sound, corporate AV, filmmaking, education, and installed wireless systems, the BA 70 simplifies battery management across compatible transmitters and receivers. Supported EW-D and EW-DX transmitters can achieve approximately 12 hours of operation, while the EW-DP EK portable receiver runs for up to seven hours. Its compact format also makes spare batteries easy to rotate during long production days. The battery reaches a full charge in approximately three hours at room temperature and works with Sennheiser charging solutions including the L 70 USB. Current Sennheiser documentation also supports BA 70 charging through the CHG 70N-C and the L 6000 charger when equipped with an LM 6070 module. Defined operating and storage limits support reliable professional battery care. Key Features 1720 mAh Rechargeable Capacity: Provides reusable lithium-ion power for compatible Sennheiser digital wireless components. Extended Wireless Runtime: Supports approximately 12 hours of operation with compatible EW-D and EW-DX transmitters. EW-DP Receiver Support: Powers the compatible EW-DP EK portable receiver for up to seven hours. 3.8 V Nominal Output: Delivers the specified operating voltage required by supported BA 70-compatible equipment. Approximately Three-Hour Charging: Reaches a full charge in about three hours under normal room-temperature conditions. Multiple Charging Options: Supports compatible Sennheiser L 70 USB, CHG 70N-C, and LM 6070/L 6000 charging solutions. Compact Battery Format: Measures approximately 2.1 x 1.2 x 0.6 inches for convenient storage and field rotation. Technical Specifications Model: BA 70 Article Number: 508860 Product Type: Rechargeable battery pack Battery Chemistry: Lithium-ion Rated Capacity: 1720 mAh Nominal Voltage: 3.8 V Maximum Charging Voltage: 4.35 V Typical Charging Time: Approximately 3 hours at room temperature Compatible Product Families: Compatible EW-D, EW-DX, and EW-DP components designed for BA 70 operation EW-D Compatibility: EW-D SK bodypack transmitter and EW-D SKM-S handheld transmitter EW-DX Compatibility: Compatible EW-DX SK and EW-DX SKM/SKM-S transmitters EW-DP Compatibility: EW-DP EK portable receiver and EW-DP SKP plug-on transmitter Compatible Chargers: L 70 USB, CHG 70N-C, and L 6000 with LM 6070 charging module Compatible Transmitter Runtime: Approximately 12 hours with supported EW-D and EW-DX transmitters EW-DP EK Runtime: Up to 7 hours Charging Temperature: 32 to 131 degrees Fahrenheit Discharging Temperature: 14 to 131 degrees Fahrenheit Storage Temperature: 14 to 113 degrees Fahrenheit Charging/Discharging Relative Humidity: 25% to 95%, non-condensing Storage Relative Humidity: 30% to 70%, non-condensing Dimensions: Approximately 2.1 x 1.2 x 0.6 inches Weight: Approximately 0.1 lb Warranty: 2 years What's In the Box BA 70 rechargeable battery