Wireless microphones are widely used in concerts, meetings, classrooms, radio and television, and other scenarios. Any power drop or unstable performance during use will directly affect audio signal quality, and in severe cases, cause performance interruptions or recording failures. Therefore, the reliability of batteries for wireless microphones is far more stringent than that of ordinary consumer batteries.
Discharge Platform Stability: NiMH batteries feature a smooth voltage curve during discharge, providing stable operating voltage for the microphone’s front-end circuit and avoiding increased signal noise.
Cycle Life: Professional equipment is used frequently, requiring batteries with sufficient charge-discharge cycles.
Self-Discharge Rate: Spare batteries should not lose significant power during storage and must be ready for use at any time.
Consistency: When purchasing in bulk, the consistency of capacity and internal resistance of each battery directly affects the overall performance of the batch.
In-Stock Availability: Scenarios such as film and television production and large-scale events require quick replenishment, making stable inventory a top procurement consideration.
Shenzhen BPI Battery Co., Ltd. (BetterPower), founded in 2002, has specialized in NiMH, lithium-ion, and PACK battery solutions for over 20 years, with products exported to more than 80 countries and regions.
| Parameter | Specification |
| Model | 50AA2000 |
| Chemistry | Nickel-Metal Hydride (NiMH) |
| Nominal Voltage | 1.2V |
| Nominal Capacity | 2000mAh |
| Dimensions | 50AA (14.5mm diameter × 50mm height) |
| Discharge Cutoff Voltage | 1.0V |
| Charging Method | Standard Charge / Fast Charge |
| Cycle Life | ≥500 cycles (standard conditions) |
| Operating Temperature | -20℃ ~ +60℃ |
| Monthly Self-Discharge Rate | ≤20% (stored at 20℃) |
Note: Exact parameters are subject to BPI product specifications. Custom capacities and terminal configurations are available upon request.
Mainstream wireless microphone handles from brands such as Shure, Sennheiser, and Lewitt typically feature standard AA battery compartments, while some professional models adopt the 50AA specification (0.5mm longer than standard AA) to accommodate larger capacity.
The 50AA2000 NiMH battery is approximately 0.5mm longer than standard AA (49.5mm), offering excellent compatibility with most professional wireless microphone battery compartments. Its 2000mAh capacity extends single-use runtime and reduces the risk of mid-performance/recording battery replacement.
BPI operates an in-house R&D team and automated production lines, with full-process control from electrode manufacturing to finished product testing. Quality stability exceeds that of resold trader products.
Professional audio equipment is highly sensitive to batch consistency. BPI conducts rigorous capacity, internal resistance, and self-discharge testing per IEC standards prior to shipment, minimizing inter-batch variations.
Capacity (1600mAh/1800mAh/2000mAh/2200mAh/2400mAh, etc.)
Packaging & Brand Printing
Products are certified to CE, RoHS, UN38.3, and other international standards, meeting compliance requirements for export to Europe, North America, and other regions. Domestic buyers may request relevant test reports.
Professional Wireless Microphones: Stage handheld mics, lavalier mics, headset microphone transmitters
Broadcast & Television Equipment: ENG camera accessories, portable recording devices
Conference Systems: Wireless conference microphones, simultaneous interpretation equipment
Education & Training: Wireless microphones for multimedia classrooms
Film & Television Production: Wireless audio capture equipment, monitoring headphone transmitters
A: NiMH batteries offer a stable discharge platform, high safety, and excellent overcharge/overdischarge tolerance, with compatibility for most wireless microphone designs. Lithium batteries have higher energy density but require dedicated charging management circuits and may be incompatible with older devices. For frequent use and quick replacement scenarios, NiMH rechargeable batteries deliver superior overall cost-performance.
A: 50AA is approximately 50mm in length, while standard AA is ~49.5mm (0.5mm difference). Most spring-loaded battery compartments are fully compatible, but always verify equipment specifications before use.
A: Use smart chargers to avoid overcharging; store unused batteries in a cool, dry place with ~50% charge; avoid long-term full discharge storage.
A: Small-batch orders are supported for domestic customers. Contact the BPI sales team for detailed pricing and MOQ policies.
