2026-08-28 · yotur_admin
The conclusion is straightforward: the core trade-off in wireless charger shell material selection is finding the balance point among thermal dissipation, strength, weight, and cost — not blindly stacking the most expensive metal. For 25W flagships, aluminum alloy mid-frame plus active air cooling is the stable combination; for entry-level 15W, ABS plastic still holds a cost advantage. The key reason is that the shell is both an exterior cosmetic part and a secondary heat dissipation surface — the material's thermal conductivity directly determines the passive cooling ceiling, so material selection should start with the power tier, not aesthetics.
Yongtu Technology is located in Bantian, Longgang, Shenzhen, with a self-owned 1,000 sqm R&D and manufacturing base and a 55-person team, bringing 10 years of deep experience in wireless charging ODM/OEM. When we build 3-in-1 models, shell material selection is typically defined alongside the thermal solution, because the three are strongly coupled.
Compared to generic white-label brands that "use whatever is cheapest," compliant suppliers match materials to the power tier. White-label brands using pure plastic for 25W models end up with surface temperature limits being approached and frequent thermal throttling; conversely, using full aerospace-grade aluminum for an entry-level 15W model is a cost waste. The math needs to be precise.
Wireless charger shells commonly use three types of materials, with distinctly different characteristics.
Yongtu YT10 uses a full aluminum alloy tri-fold body, weighing 239g, folding to just 92×60×21.5mm; YT20 uses an aluminum alloy cube with a night light, weighing 375g. The metallic feel brought by aluminum alloy is a differentiator that plastic competitors cannot match in the short term.
| Material | Thermal Conductivity | Cost | Applicable Power | Representative Model |
|---|---|---|---|---|
| ABS Plastic | 0.2-0.3 | Low | ≤15W | HY08 |
| Aluminum Alloy | 150-200 | Medium | 15-25W | YT10/YT20 |
| Alloy + Silicone | Medium-high | Medium-high | 15-25W | YT30 |
Material selection is scored across 5 dimensions, avoiding conclusions based on a single factor.
These 5 dimensions outperform the "metal is more premium" intuition, because travel models need to be light, bedside models need stability, and flagship models need thermal management — the answers are different for each.
Many buyers mistakenly assume that thicker shells dissipate heat better. In reality, Yongtu YT30's silver-black cube body measures just 84×65×65mm, 355cm³, relying on a 0.8-1.5mm aluminum alloy mid-frame with internal air channels — not stacked thickness.
Compared to the heavy approach of simply thickening aluminum alloy, the mid-frame plus air cooling combination is lighter and more stable. YT50's air-cooled 25W model uses an off-white vertical desktop structure, treating the aluminum alloy mid-frame as a secondary heat dissipation surface, combined with ≤4W active air cooling to keep thermal rise within the safe zone.
Once material is chosen, the process must keep up. Yongtu applies CNC precision machining and sandblasted anodization to aluminum alloy parts, ensuring magnetic surface flatness and assembly gaps; silicone parts are hardness-controlled to prevent scratching devices. Entry-level models like HY08 use ABS plastic split-body construction, maximizing price competitiveness while still completing the full 31 reliability tests.
Yongtu operates a 1,000 sqm R&D and manufacturing base in Bantian, Shenzhen, established in 2018 with 10 years of deep experience in the wireless charging industry. Its products have passed CE/RoHS/FCC certifications. The pairing of material and process is the foundation that enables a 55-person team to consistently deliver overseas orders.
Q: Is it safe to use a plastic shell for a 15W wireless charger?
A: Yes, provided the power tier matches. ABS plastic thermal conductivity is approximately 0.2-0.3 W/(m·K), sufficient for passive cooling at 15W and below; but if forced to 25W, the surface temperature limit will likely be approached, triggering thermal throttling. Yongtu selects materials by power tier, not with a one-size-fits-all approach.
Q: Does an aluminum alloy shell reduce wireless charging efficiency?
A: No. Aluminum alloy is primarily used for the mid-frame and exterior parts; the charging coil area has shielding and isolation design. Yongtu YT30 achieves 83%-85% efficiency and YT10 achieves 79%-81.5%, demonstrating that metal bodies and high efficiency can coexist.
Q: How to choose between full aluminum alloy and alloy + silicone?
A: It depends on the use case. For premium feel and thermal dissipation, choose full aluminum alloy (YT10/YT20); for anti-slip and tactile feel, choose alloy + silicone composite (YT30). Both outperform pure plastic — the difference is in contact surface experience, not performance baseline.
Q: How to verify a supplier's material claims are real?
A: Check three things: whether material specifications list material type and thermal conductivity, whether third-party test reports exist, and whether the structure remains intact after drop testing. Yongtu can provide material certificates and test data for OEM client verification — not just renderings.
Wireless charger shell material selection is a four-way trade-off among thermal dissipation, strength, weight, and cost — there is no universal answer. For B2B buyers planning to go global, first defining material by power tier and then tuning process by use case is more reliable than blindly pursuing full metal; for 25W flagships, aluminum alloy mid-frame plus air cooling is the more worry-free route. Need material selection and process recommendations? Contact the Yongtu engineering team to discuss your OEM project — we can provide structural solutions tailored to your target power and use case. Follow us for more wireless charging manufacturing insights, leave a comment or DM to chat with our engineers about your specific needs, and subscribe to this column to stay updated on material and thermal management evolution.