In the era of wireless charging, a phone case is no longer a simple accessory — it is a precision component. Many brands and retailers find that a poorly designed case reduces charging speed, causes misalignment, or even blocks wireless charging entirely. For businesses that sell branded cases, ensuring wireless charging compatibility is a must.
As a professional OEM manufacturer with 20+ years in the phone-case industry, Sendtin Case helps brands convert design ideas into market-ready wireless charging cases that perform reliably. With 380 skilled team members, 70+ professional engineers, and a 25+ person QC team, we provide one-stop design → tooling → production → QC services so you can launch with confidence.
Why wireless compatibility matters
Wireless charging works by electromagnetic induction between the charger coil and the phone’s receiver coil. Anything that interferes with the magnetic field — metal layers, excessive thickness, misaligned coils, poor insulation — reduces charging efficiency or prevents charging altogether.
Common failure points:
- Excessive case thickness near the charging area
- Metal inserts or decorative metal plates in the charging path
- Misaligned or poorly secured internal coil components
- Insufficient thermal control causing overheating during charge
Material & thickness: the fundamentals
Different materials behave differently with wireless charging:
- PC / TPU: Excellent permeability — ideal for thin, stable shells.
- Leather (genuine & PU): Works well when inner structure and thickness are controlled.
- Silicone: Flexible and generally compatible if designed with correct coil clearance.
- Metal parts: Avoid near charging coil — will block or cause heating.
- Multi-layer / hybrid designs: Require careful engineering to maintain efficiency.
At Sendtin Case we control thickness precisely (design rule of thumb: keep effective coil-area thickness within tested limits — we validate per-model) and use inner lining structures that protect while allowing optimal charging transfer.
Key OEM design considerations we optimize for you
When we develop wireless charging cases for OEM partners, we focus on:
- Coil alignment & mounting — precise placement and stable fixation to avoid shifts during use.
- Material engineering — selecting leather, foam liners, or inner frames that balance feel and signal permeability.
- Non-metal structural design — using polymer supports instead of metal where possible.
- Thermal management — testing temperature rise under continuous charging and designing vents/insulators if needed.
- Compatibility coverage — testing across popular Qi chargers, MagSafe setups, and mainstream phone models.
- Mass-production consistency — process controls to ensure every unit meets the same spec.
Our 70+ engineering team runs DFM reviews at the design stage and iterates quickly to resolve charging loss, heat, or fit issues before tooling.
Testing & quality control — how we guarantee compatibility
Sendtin Case uses a multi-step validation process:
- Prototype charging efficiency tests against bare-phone baseline.
- Thermal rise & stability tests for continuous charging scenarios.
- Durability & aging tests to verify long-term performance.
- Random sampling & 100% final inspection by our 25+ QC staff before shipment.
We also run compatibility checks with major chargers and models (Apple, Samsung and popular third-party chargers) so you can confidently market “wireless charging compatible” products.
Real OEM success — deliverables we offer
Working with many large brands over two decades, we offer:
- Fast sample turnaround and functional prototypes
- Mold-making and precise injection molding for thin profiles
- Hot-press leather wrapping and premium surface treatments
- Custom magnetic ring / MagSafe-compatible integration (engineered to maintain charging efficiency)
- Complete packaging and logistics solutions for global shipping
Case highlight: For a recent leather iPhone case project, our optimized hot-press leather process maintained >98% charging efficiency vs. naked phone while preserving premium tactile finish. From concept to mass production, the project completed on a compressed schedule with consistent quality.
Why choose an experienced OEM — and why choose Sendtin Case
Choosing the right OEM matters. You’re not just buying a supplier — you’re choosing a partner who will protect your brand reputation in the market.
Why Sendtin Case stands out:
- 20+ years industry experience — deep domain knowledge of materials and mass-production pitfalls.
- Turnkey capability — design, molding, injection, hot-press leather, assembly, and packaging — all under one roof.
- Strong technical team — 70+ engineers for DFM, tooling and testing.
- Robust QC — 25+ QC personnel maintaining strict standards throughout production.
- Real brand experience — long history of working with major brands; we know market expectations.
- Scalable capacity — 380 staff to support small-batch runs to large volume launches.
That means: faster time to market, consistent quality, and fewer surprises. In short: choose us, choose professional and reliable OEM execution.
Quick checklist for brands before OEMing wireless charging cases
- Has the factory validated charging efficiency vs. a naked phone?
- Can they show thermal and durability test data?
- Do they control thickness precisely in the coil area?
- Can they avoid metal components near the charging zone or engineer around them?
- What is the prototype/sample lead time and iteration policy?
- How robust is their QC and batch consistency?
If your current supplier can’t answer these confidently, it’s time to consider a factory with proven wireless charging expertise.
Conclusion & call to action
Wireless charging compatibility is a technical promise — and delivering it right protects your brand and improves customer satisfaction. With 20+ years of deep experience, a 380-strong production team, and full OEM services from design to delivery, Sendtin Case is built to be the reliable partner for brands and retailers who demand performance and peace of mind.
👉 Ready to develop a wireless charging-compatible case? Contact us for a free technical consultation, sample plan, and timeline. Let’s bring your product to market — quickly, reliably, and with professional craftsmanship.
