DUAL WF Battery Contacts for Reliable Power Connection
2 month ago
Product details
The DUAL WF Battery Contacts are engineered as a high-integrity power interface for dual-cell battery configurations, where "WF" denotes a wire-formed or wipe-fit contact geometry optimized for low-resistance, vibration-resistant connections. Unlike stamped flat contacts that rely on single-point pressure, these dual WF contacts utilize two independent spring beams per polarity—creating redundant electrical paths that significantly reduce the risk of intermittent power loss. Each contact features a coined or dimpled contact surface that penetrates oxide layers on battery terminals, ensuring a fresh, low-impedance junction with every battery insertion. The dual-beam design maintains consistent normal force (200–300 gf per beam) across the battery's entire discharge life, compensating for dimensional variations in AA, AAA, or other cylindrical cells. These contacts are typically configured in series (increasing voltage) or parallel (increasing capacity) arrangements, with integrated polarity keying to prevent reverse installation. Manufactured from beryllium copper or phosphor bronze with nickel underplate and selective gold flash, the DUAL WF series achieves contact resistance below 20 mΩ initial and less than 50 mΩ after 5,000 insertion cycles. The wipe-fit action during battery insertion automatically cleans both the contact tip and battery terminal, reducing field failures caused by oxidation or contamination.
Reliability is the cornerstone of the DUAL WF Battery Contacts, validated through accelerated life testing that simulates 10 years of field use. The redundant dual-beam architecture provides inherent fault tolerance: if one beam loses contact due to mechanical shock or spring relaxation, the second beam maintains electrical continuity, preventing device reset or data loss. This feature is critical for medical alarms, industrial sensors, and portable safety equipment where unexpected power interruption is unacceptable. Each contact is rated for continuous currents up to 5A with temperature rise below 30°C at full load, suitable for high-drain applications such as motor drives, RF transmitters, and LED lighting systems. The wire-formed construction (typically 0.4–0.6 mm diameter music wire or round beryllium copper) offers superior fatigue resistance compared to stamped flat springs, with tested endurance exceeding 20,000 flex cycles without permanent set. Optional plating finishes include tin (cost-effective for consumer products), nickel (for corrosion resistance in humid environments), and gold (for signal-level applications requiring micro-ohm stability). Thermal cycling tests from -40°C to +85°C show no contact degradation, making these contacts suitable for outdoor or automotive-grade electronics. Furthermore, the open geometry promotes air circulation around batteries, reducing self-heating and extending runtime in high-current pulse applications.
The DUAL WF Battery Contacts are widely deployed in portable medical devices (glucometers, infusion pumps), industrial handheld terminals, professional audio equipment, and military-spec battery packs. Their dual-beam, wipe-fit design accommodates battery length tolerances of ±1.5 mm without losing contact force—a significant advantage over rigid stamped contacts that may deform or lose pressure with undersized cells. Installation is simplified through several termination options: through-hole pins for hand or wave soldering, surface-mount tabs for automated reflow assembly, and insulated wire leads for remote battery compartments. Many variants include integrated mounting flanges with M2 or M2.5 screw holes for secure chassis attachment in high-vibration environments (e.g., vehicle-mounted devices or drone battery bays). The contacts are supplied in continuous reel packaging for automated pick-and-place assembly, with solder tail coplanarity guaranteed within 0.1 mm. For design engineers, the DUAL WF series offers CAD models and full specification sheets including force-deflection curves, temperature rise data, and derating guidelines. Custom modifications—such as modified beam length, alternative plating, or integrated thermistor mounting tabs—are available with typical lead times of 4–6 weeks. When combined with a UL-recognized battery housing (sold separately), the complete assembly meets IEC 62133 and UN38.3 transport safety requirements. Minimum order quantities start at 1,000 pieces for prototyping, with volume pricing available for production quantities exceeding 50,000 units annually.
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HuiZhou Antenk Electronics Co., LTD
Audited supplier
5 year
Main Product:
Connectors ,
Wire harness,
Board to board connector ,
Wire to board connector ,
Battery holders ,
Industrial connector