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

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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

Shipping

Orders ship from our northern NJ warehouse the same day if ordered by 3:30PM EST. Transit time ETA's are listed in the image below:

Return Policies

All orders come with our industry leading 90-Day return policy.

Cash Back or Store Credit available for returns within 30 days.
Store Credit available for returns within 31-90 days.

Restocking fees

Unopened Items: 5%
Opened but Mint Condition: 15%
Blemished, Missing/Damaged Packing or Accessories: 25%

Shipping Costs

Buyer is responsible for return shipping costs
If "Free" or discount shipping was provided with original order, our actual shipping cost will be deducted from the amount refunded/credited

Damages & Defects

We will swap any item reported as damaged or defective within 7 days of delivery for free. All transportation and replacement costs will be covered by us (within US48 states).