Sennheiser 505974

Overview

The Sennheiser 505974 is a rechargeable battery pack designed specifically for evolution wireless D1, SpeechLine Digital Wireless SL, and AVX SK bodypack transmitters. It provides a reliable 3.7 V power supply from a 2030 mAh lithium-ion cell, allowing users to replace disposable AA batteries with a single rechargeable source. This battery pack supports long rehearsals, presentations, and recording sessions by delivering consistent power and reducing interruptions.

Its compact and lightweight design ensures it fits comfortably on a belt, in a pocket, or clipped to a guitar strap, making it ideal for performers, speakers, and audio professionals who need dependable wireless operation without added bulk.

Key features

• Rechargeable lithium-ion battery that eliminates the need for disposable AA batteries, reducing ongoing costs and environmental waste
• High capacity of 2030 mAh to support extended use during long sessions without frequent battery changes
• Quick and secure slide-in installation that locks the battery firmly into compatible bodypack transmitters
• Compact and lightweight construction designed to integrate seamlessly with Sennheiser wireless systems without adding noticeable weight
• Compatible with multiple Sennheiser transmitter series, including evolution wireless D1, SpeechLine Digital Wireless SL, and AVX SK
• Supports convenient recharging via dedicated Sennheiser charging docks or USB power when supported by the transmitter
• Integrated protection circuitry that monitors charging to preserve battery health and maintain consistent runtime over many cycles

Key specs

• Voltage: 3.7 V
• Capacity: 2030 mAh
• Battery type: Lithium-ion rechargeable cell
• Compatible transmitters: evolution wireless D1, SpeechLine Digital Wireless SL, AVX SK bodypack transmitters
• Charging methods: Sennheiser charging dock, USB power (when supported)
• Weight: lightweight design for comfortable wear

Compatibility and usage

This battery pack is tailored for professional audio environments where wireless bodypack transmitters are essential. It fits well in setups for live performances, broadcast, corporate presentations, and studio recording. Users who depend on uninterrupted wireless audio will benefit from the reliable power delivery and easy recharging options.

Its compatibility with multiple Sennheiser transmitter lines makes it a versatile choice for audio engineers and event managers who use different wireless systems across various events and productions.

Charging and maintenance

Recharging the battery pack is straightforward and user-friendly. It can be charged while installed in the transmitter if USB power is supported, or placed in a dedicated Sennheiser charging dock for efficient power replenishment. The built-in protection circuitry safeguards the battery from overcharging and helps maintain its capacity over time, ensuring dependable performance session after session.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Shipping costs are calculated at checkout based on destination, total weight, and selected speed. Free shipping applies to carts over $100 (excluding heavyweight items). All available options and final pricing are clearly shown before payment so you can choose the service that best fits your needs.

Deliveries are handled by major carriers such as USPS, UPS, and FedEx. Estimated delivery times are displayed at checkout and may vary depending on service level and location. Please note that these are estimates and can be affected by weather, holidays, or carrier volume. Once your order ships, you’ll receive a tracking number for real-time updates from pickup to final delivery.

Providing an accurate shipping address helps prevent delays, and changes may be limited once the order has been dispatched. P.O. boxes are supported only when permitted by the selected carrier. Packaging and handoff are optimized to protect items during transit, though oversized or high-weight products may require special handling. All shipping methods and any related constraints are clearly shown during checkout.

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Returns are accepted within 30 days of delivery. Items must be unused, in the same condition received, and include all tags, manuals, accessories, and original, unaltered packaging. To start a return, please email us for approval. Items sent back without approval may be refused or returned to the sender. If any item is kept, its value will be deducted from the refund.

Non-returnable items include opened TVs, combos, or monitors 37″ or larger, opened computers or software, electronic downloads, opened consumables (film, paper, bulbs, media, ink), custom or modified computers, special-order or “nonreturnable” items, submerged underwater gear, and opened educational media.

After inspection, refunds are issued to the original payment method. Please allow 5–7 business days for the credit to post. Shipping and handling are nonrefundable. If an item is used, incomplete, or not in its original condition, a 30% restocking fee may apply. Direct exchanges are not offered. To exchange an item, please purchase the replacement separately and return the original for a refund.

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We act solely as a reseller. Any product warranty is provided and administered by the manufacturer, not by our store. That means eligibility, coverage, and outcomes are determined by the manufacturer’s policy for each brand and model. Before purchasing, we recommend reviewing the warranty terms on the manufacturer’s website or in the product documentation to confirm what is covered and for how long.

If you need warranty service, please file the claim directly with the manufacturer. They may require proof of purchase, the product serial number, original packaging, photos, or basic troubleshooting. Some brands ask you to register the product or obtain a case number before shipping it for repair or replacement. We don’t submit or approve claims, but we can point you to the correct support links and contact details.

Keep your invoice and packaging in a safe place, and report any functional issues to the manufacturer as soon as they appear. If you’re unsure whether a problem is covered, the manufacturer’s support team can confirm next steps and timelines. While we cannot intervene in decisions or outcomes, we’re happy to provide purchase documentation or guidance so you can move through the warranty process smoothly.

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