Sennheiser BA 40 Battery for Wireless Microphone Transmitters

Power your Sennheiser wireless microphone system with the compact, rechargeable BA 40 Battery. Engineered for professionals who demand dependable, long-lasting power in a slim, lightweight package, the BA 40 is built to fit perfectly within the battery compartment of compatible Sennheiser transmitters. Its high-energy capacity and proprietary sizing deliver uninterrupted performances on stage, in the studio, or out in the field. Designed to reduce weight without sacrificing reliability, this battery is ideal for performers, broadcasters, and content creators who rely on crystal-clear audio and smooth operation from start to finish.

• Small, lightweight design: The BA 40 battery is crafted to be smaller and lighter than many other rechargeable options, making it ideal for portable devices and on-the-go performances. Its compact form reduces fatigue during long events and keeps your rig feeling nimble without compromising power.
• Proprietary battery size for maximum productivity: Sennheiser’s proprietary sizing ensures a precise fit and dependable contact with your transmitter. This tailored design minimizes fit issues and ensures a secure, stable connection for continuous performance.
• Rechargeable Li-ion chemistry: With rechargeable lithium-ion technology, the BA 40 delivers consistent voltage and dependable recharge cycles, helping you reduce waste and lower running costs over time while maintaining high energy output when you need it most.
• High-capacity performance for longer sessions: The 2200 mAh capacity provides extended usage between charges, so you can perform longer between power replenishments. This makes the BA 40 well-suited for lengthy gigs, tours, or busy broadcast shoots where battery changes would otherwise interrupt the flow.
• Reliable power with safety and longevity in mind: Engineered for durability, the BA 40 supports safe charging and discharging cycles, protecting both the transmitter and the battery. Its design minimizes the risk of memory effects and delivers a stable, dependable power source for daily use.

Technical Details of Sennheiser BA 40 Battery

• Battery Type: Rechargeable Li-ion
• Nominal Voltage: 3.6 V
• Capacity: 2200 mAh
• Form Factor: Proprietary Sennheiser battery size for wireless transmitters
• Compatibility: Designed for use with Sennheiser wireless microphone transmitters that accept the BA 40 battery
• Safety and Build: Includes standard protections for over-discharge and over-charge to preserve longevity and performance

how to install Sennheiser BA 40 Battery

• Power down your transmitter before handling the battery compartment to prevent any electrical issues
• Open the battery compartment cover according to your transmitter’s manual and remove the old battery if present
• Align the BA 40 with the contacts inside the compartment, ensuring the polarity matches the transmitter’s connection points
• Gently insert the battery until it sits securely in place and the contacts are fully seated
• Close the battery compartment cover and power on the transmitter to verify proper operation
• When the battery indicates low charge, recharge using an appropriate charger designed for the BA 40 or the compatible Sennheiser charging solution

Frequently asked questions

• Q: Is the BA 40 compatible with all Sennheiser wireless transmitters?
  A: The BA 40 is designed for use with Sennheiser transmitters that specify a rechargeable BA series battery size. Always check your device’s manual or official Sennheiser compatibility list to confirm fitment.
• Q: How long does the BA 40 battery last on a full charge?
  A: Battery life varies with usage patterns, transmitter model, and power settings. The BA 40’s 2200 mAh capacity is intended to offer extended performance for typical shows and recordings, reducing the need for frequent replacements during a session.
• Q: Can I charge the BA 40 while it’s in the transmitter?
  A: Many transmitters support hot-swapping or charging in the device, but always refer to your model’s instructions. If your transmitter lacks built-in charging, use the recommended external charger for the BA 40 to ensure safe charging.
• Q: How should I care for the BA 40 battery?
  A: Store and charge the battery at normal room temperature, avoid exposing it to extreme heat or cold, and use only approved chargers. Periodically inspect the battery and contacts for signs of wear or corrosion and replace if necessary.
• Q: Is the BA 40 replaceable on all Sennheiser transmitters?
  A: Yes, in devices designed for the BA 40 battery size. Please consult your transmitter’s user guide to confirm battery replacement procedures and compatibility.