Sennheiser BA 70 | Rechargeable Battery for EW-D Transmitters | 12-Hour Lithium-Ion Power

Rechargeable Wireless Transmitter Battery

Sennheiser BA 70 is a high-capacity lithium-ion battery engineered for use with Sennheiser EW-D SK bodypack and EW-D SKM-S handheld transmitters. Designed to replace AA batteries, it provides extended runtime and consistent performance for demanding wireless audio applications.

Sennheiser BA 70 Competitive Differences

• Delivers up to 12 hours of operation per charge
• Compatible with L70 USB dual-charger (sold separately)

Sennheiser BA 70 Description

The Sennheiser BA 70 is a reliable power solution for users of the EW-D series wireless systems. With a 1720mAh capacity and nominal 3.8V output, this rechargeable lithium-ion battery ensures consistent power for extended sessions, whether on stage or in the studio. Built to handle the rigors of professional use, it supports a wide range of operating temperatures and humidity levels, making it suitable for indoor and outdoor environments. The BA 70 charges fully in approximately three hours using the optional L70 USB charger, ensuring fast turnaround between uses. Lightweight and compact, it fits seamlessly into EW-D transmitters without adding bulk, replacing the need for disposable AA batteries and helping reduce waste. Whether you're a touring artist, live sound engineer, or AV technician, the BA 70 is an essential accessory for reliable wireless performance.

Model Features

• Rechargeable lithium-ion battery
• Designed for EW-D SK and SKM-S transmitters
• Provides up to 12 hours of runtime
• Fast 3-hour charge time
• Compact and lightweight

Model Specifications

• Type: Lithium-Ion
• Capacity: 1720 mAh
• Voltage: 3.8 V nominal, 4.35 V max charging
• Charging Time: 3 hours at room temperature
• Temperature Range: Charging: 32–131°F (0–55°C), Discharging: 14–131°F (10–55°C), Storage: 14–113°F (-10–45°C)
• Humidity (Relative): Charging/Discharging: 25–95% (non-condensing), Storage: 30–70% (non-condensing)
• Dimensions: 2.1 x 1.2 x 0.6 in (54 x 30 x 15 mm)
• Weight: 1.2 oz (33 g)

What's In The Box

• Sennheiser BA 70 battery