All-Day Power, Sleek Design. The Heart of Your Smartwatch.
Hanery is a leading China-based manufacturer of ultra-thin, high-density, custom-shaped polymer batteries for smartwatches, hybrid watches, and fitness trackers. We engineer the core power that enables longer runtimes, sleeker designs, and a superior user experience.
Safety
Low Self-Discharge
Long Lifespan
Lightweight
Your Expert Watch Battery Manufacturer in China
Ultra-Thin Profiles
Manufacturing batteries with thicknesses under 2.5mm to fit the slimmest watch cases.
Custom Shapes
Specializing in round, rectangular with rounded corners, and free-form batteries to maximize internal space.
High Energy Density
Delivering the maximum mAh capacity to power bright displays, sensors, and GPS for longer.
High Cycle Life
Engineered for 500-1000+ charge cycles, perfect for devices charged daily.
Uncompromised Safety
Rigorous testing protocols for devices in constant contact with the skin.
Wholesale & Volume Production
Competitive, direct-from-factory pricing for your mass production needs.
Specializing in Custom Watch Batteries as Your B2B Supplier
Hanery is your specialist supplier for custom batteries, meticulously engineered for the unique challenges of smartwatches. We master the art of maximizing energy density in extremely limited volumes while ensuring the high cycle life required for daily charging. Our mission is to provide a safe, durable, and long-lasting power source that serves as the invisible, yet vital, heart of your innovative wearable device.
Wholesale Smart Watch Batteries From Hanery
Apple Watch Battery
Amazfit Watch Battery
COROS Watch Battery
Fire Boltt Watch Battery
Struggling to Fit More Features Without Sacrificing Battery Life?
We help you break through design limitations with higher-density battery solutions.
Customize Your Watch Batteries with a Leading Manufacturer
Our customization services are precision-engineered for the next generation of smartwatches.
Custom Shapes & Profiles
We design and produce round, square, and free-form batteries that fit perfectly around other internal components.
Ultra-Thin & Stacked Designs
We utilize advanced stacking technology to create ultra-thin cells that maximize capacity within minimal height constraints.
Maximum Energy Density
We leverage cutting-edge anode and cathode materials to deliver industry-leading Watt-hours per liter (Wh/L).
High Cycle Life Chemistry
Our batteries are formulated to endure the rigors of daily charging, maintaining high capacity for years of use.
Optimized Power Delivery
Engineered to efficiently handle the dynamic power loads of a smartwatch—from low-power standby to high-drain GPS and sensor activity.
Micro-Integration with FPCs
We integrate tiny Flexible Printed Circuits (FPCs) and connectors for seamless assembly in complex, space-constrained environments.
Get Your Watch Batteries in Bulk, Step-by-Step
Our proven, collaborative process takes your concept to mass production with speed and precision.
In-Depth Consultation
We begin by analyzing your watch's industrial design, power budget, cycle life targets, and volume forecasts.
Engineering & 3D Modeling
Our team provides a comprehensive proposal with 3D models, technical specifications, and a transparent wholesale quote.
Rapid Prototyping & Fit Testing
We produce functional prototypes for you to validate for fit, electronic performance, and runtime in your actual watch hardware.
Collaborative Refinement & Approval
We refine the design based on your testing data before locking in the final specifications for mass production.
High-Volume Mass Production
Your bulk order is manufactured with micrometer-level precision in our advanced, cleanroom facility.
Global Logistics & Compliant Delivery
We manage the entire logistics process, ensuring your batteries are shipped safely and in full compliance with all regulations.
6 Key Benefits From Your Watch Battery Manufacturer
Choosing Hanery gives your smartwatch a powerful competitive advantage in a crowded market.
Longer Battery Life
Provide the multi-day runtime that consumers demand—a key purchasing factor.
Sleeker & Thinner Designs
Our compact batteries enable more elegant and comfortable watch designs.
Enhanced Brand Reputation
A reliable battery leads to higher customer satisfaction and fewer product returns.
Faster Time-to-Market
Our expertise in this complex niche accelerates your product development timeline.
A True Technical Partner
We provide invaluable DFM (Design for Manufacturing) feedback to optimize your entire product.
Scalable & Reliable Supply
Our factory is prepared to scale with you as your smartwatch captivates the market.
Smartwatch Battery FAQ
We can manufacture ultra-thin cells with a thickness of less than 2.5mm. The final thickness depends on the required capacity and shape.
Yes, producing round and other non-rectangular batteries is a core strength. We can design a cell that maximizes the available space within your circular watch case.
Due to the high degree of customization and tooling, our MOQ for a new smartwatch battery design typically starts at 50,000 to 100,000 units. Please contact us to discuss your project’s specific needs.
We engineer our smartwatch batteries for high cycle life, typically specified to retain over 80% of their original capacity after 500 to 1000 charge cycles, easily covering the product’s expected lifespan.
Safety is our absolute priority. We use premium, stable materials and our batteries are designed and rigorously tested to pass international safety standards (IEC 62133, UL), which include tests for heat, impact, and short-circuiting.
After the design is finalized, the lead time for the first batch of functional prototypes is generally 4-6 weeks.
We use a combination of strategies: leveraging the highest energy density anode/cathode materials available, advanced cell stacking techniques to minimize wasted space, and custom shapes to fill every available cubic millimeter.
Yes. We will manage the entire certification process to ensure the battery meets all required standards for your target markets, including CE, UKCA, UL, and transportation regulations like UN38.3.
Please provide the target dimensions (or a 3D model of the available space), required minimum capacity (mAh), voltage (3.7V), discharge current details (continuous/peak), and your estimated annual volume.
While we don’t design your mainboard, our engineers can provide expert guidance on best practices for connecting the battery, selecting appropriate connectors (like FPCs), and optimizing your charging parameters for longevity and safety.