Dongguan Everwin Tech Co., Limited

We don’t just sell batteries—we engineer them from the inside out. Behind every customized NiMH or LiFePO4 battery pack we deliver lies a full chain of precision manufacturing, cross-team collaboration, and strict quality assurance. Here's a closer look at how we make it happen. A Streamlined Assembly Line with Precision in Every Step Our production line is equipped for efficient battery pack assembly, supporting multiple cell formats and battery chemistries—from NiMH to LiFePO4 and Li-SOCl₂. Every pack goes through: Spot welding, insulation wrapping, and smart BMS integration Capacity sorting & balancing Barcode & serial tracking for quality traceability 100% testing before delivery (voltage, internal resistance, safety) Whether for industrial meters, solar systems or IoT devices, our batteries are built to match real-world demands. From Requirements to Realization – Our Office Team Makes It Work In this workspace, our R&D engineers and sales coordinators work closely to understand each client's unique needs. Here’s how they contribute: Design custom pack configurations (voltage, size, output, protection) Ensure electrical safety and BMS compatibility Coordinate sampling, certification, and production planning Offer multilingual support for global clients With both technical know-how and business experience, this team ensures every project moves from concept to delivery smoothly. Reliable Communication and Support Throughout the Project Our service team follows each order through the entire lifecycle—from inquiry to post-delivery support. With quick response times and clear communication, we help clients: Track production progress and lead times Resolve technical or shipping issues swiftly Plan future orders based on feedback and usage data Build long-term trust through consistent service For us, a battery is not just a product—it's a long-term commitment to quality, performance, and partnership. Ready to Customize Your Next Battery Solution? From assembly line to engineer’s desk to support inbox, every part of our operation is geared toward one thing: helping you power your application with safety and confidence.

A Case Study in Custom Cell Development & Assembly Craftsmanship In this project, we delivered two core battery solutions—NiMH rechargeable batteries and Li-SOCl₂ primary lithium batteries—tailored for clients requiring long-lasting, stable, and high-performance power sources across industrial environments. But beyond product delivery, this case reflects our deep engineering strength and flexible manufacturing capabilities in cell customization, battery assembly, and design integration. 01 | Custom NiMH Battery Packs — Designed for Real-World Durability Our NiMH production line supports a wide range of cylindrical cell sizes, from 2/3AA to D type, with the ability to customize voltage, capacity, and assembly structure. In this case, we: Selected high-drain NiMH cells with enhanced cycle stability (800+ cycles) Designed tab-connected and shrink-packed battery packs with precise polarity control Integrated spot-welded nickel strips, PVC wrapping, and custom wire leads for seamless plug-and-play installation Applied triple-layer quality control, including capacity sorting, internal resistance testing, and simulated load tests Our packs are widely compatible with handheld devices, medical tools, and consumer electronics—where reliability and safety matter most. 02 | Advanced Li-SOCl₂ Batteries — Built for Long-Term Field Deployment Lithium Thionyl Chloride (Li-SOCl₂) batteries demand precision—from material purity to sealing technique. For this batch, we produced ER14250 and ER18505 models, focusing on extreme consistency in output and long-term shelf stability. What sets our process apart: All cells are vacuum-sealed using laser welding to ensure absolute airtightness We utilize high-purity thionyl chloride, combined with spiral-wound cathode construction, enabling energy density up to 700Wh/kg Each battery undergoes ultra-low leakage current testing (

Customized LiFePO4 Battery for Solar Energy Storage Application: Off-grid solar systemBattery Type: LiFePO4, custom-builtClient Requirement: Safe and long-lifespan storage battery for residential solar use Key Features Stable and safe: Grade A LiFePO4 cells with built-in BMS protection Real-time monitoring: LCD screen displays voltage, state of charge, and temperature Custom casing: Durable ABS housing with reinforced terminals Portable design: Built-in carry strap for easy handling Long cycle life: Over 3500 cycles at 80% depth of discharge Scalable: Supports series and parallel connections for larger systems Why Choose Us We specialize in custom LiFePO4 battery solutions for solar energy storage. From internal configuration to housing design, every detail is engineered to meet specific client needs with high-quality standards and reliable performance. The client was fully satisfied with the delivered product and has already initiated repeat orders for upcoming solar installations.