When a compact inspection robot weaves through the gaps in a precision workshop, when an industrial drone accurately returns to base after completing its patrol, when an underwater robot keeps working in a confined water environment, when a desktop service robot moves autonomously between workstations, and when a companion robot stays by the user’s side around the clock—in all these scenarios, a common pain point consistently hinders fully unmanned operation: the cramped internal space simply cannot accommodate traditional charging connectors and bulky power supply modules.

Limited volume, restricted payload capacity, and precious internal realestate, all while needing to balance charging efficiency, interface protection, and longterm operational stability—this is almost the universal endurance challenge faced by developers of small intelligent devices. Drawing on years of expertise in magnetic resonance wireless charging, ZoneCharge now launches its casingfree, compact, and lightweight wireless charging module series—ZK12, ZK13, ZK14, and ZK15—to provide a power supply solution that “takes no extra space, sacrifices no performance, and fits all scenarios,” fundamentally upgrading the autonomous operation of small devices.

Addressing Industry Pain Points: The Endurance Upgrade Dilemma for Small Devices

Unlike large AGVs and industrial robots that have ample room for structural modifications, upgrading the endurance of small intelligent devices often faces multiple constraints:

Tight internal space – traditional enclosed charging modules are difficult to fit in; forcing them in would crowd out critical components such as batteries and sensors.

Low payload thresholds – an excessively heavy power module increases the overall load, reducing endurance and manoeuvrability.

Exposed plugin charging interfaces – these are prone to wear, oxidation, water ingress, and dust contamination, especially in underwater, dusty, or highhumidity environments, leading to high failure rates.

Fully autonomous operation required – manual plugin charging interrupts the 24/7 unmanned operational loop, undermining true autonomy.

These seemingly minor pain points are precisely the core obstacles that prevent many small intelligent devices from evolving from “functional” to “excellent” and from “semiautonomous” to “fully autonomous.” ZoneCharge’s lightweight wireless charging series is purposebuilt to overcome these challenges.

FullSeries Precision Matching: Covering Diverse Small Intelligent Device Needs

The newly launched ZK12, ZK13, ZK14, and ZK15 modules are individually optimised for different application scenarios, ensuring that performance is never compromised for the sake of general compatibility:

▍ ZK12 75W Wireless Charging Module – Designed for garden robots and small mobile inspection devices. Equipped with a triple safety protection mechanism, it can withstand outdoor dusty environments and large temperature fluctuations, reliably supporting highfrequency automated recharging.

▍ ZK13 60W Wireless Charging Module – Tailored for underwater robots. Its highly compatible circuit design, combined with a fully separated structure, allows the receiver to be embedded inside the device body, while the transmitter can be customhoused to easily handle wet, corrosive underwater conditions.

▍ ZK14 45W Wireless Charging Module – An ideal choice for desktop robots, home companion robots, and small cleaning robots. Its ultralightweight casingfree design occupies minimal internal space, yet achieves over 85% charging efficiency, fully charging a typical 20Wh battery in just 1.5 hours—more than sufficient for daily highfrequency use.

▍ ZK15 120W Wireless Charging Module – Aimed at small industrial drones and heavyduty compact inspection devices. It delivers high power while maintaining a small footprint, supporting shortstop fast charging that significantly increases the number of daily missions and total operating hours.

All four modules feature a casingfree design, allowing developers to embed the receiver directly into the device body without taking up extra external space. The transmitter, meanwhile, can be customenclosed according to actual scenario requirements to achieve waterproof, dustproof, corrosionresistant, or other special protection ratings—eliminating the need for complex structural modifications to protect the charging module.

More Than Just Charging: Completing the Essential Link for Autonomous Operation

This lightweight wireless charging solution brings far more to small intelligent devices than simply “removing the charging cable”:

Devices no longer need to precisely align with physical connectors; they can automatically recharge simply by stopping within the charging zone. Coupled with autonomous navigation systems, this truly enables a “mission → return → recharge → redeploy” fully unattended workflow.

The contactless charging mode eliminates wear and oxidation caused by metal plugging and unplugging, significantly reducing longterm maintenance costs and extending overall battery life.

Flexible input/output adaptive regulation ensures compatibility with batteries of different brands and specifications. Developers do not need to redesign the entire circuit to accommodate the charging module, greatly shortening the time from R&D to market launch.

From millimetreprecision compact inspection robots in precision workshops, to small drones delivering packages across city streets, from underwater exploration robots performing subsea missions, to service and companion robots operating in homes and offices—more and more small intelligent devices are moving from “functional prototypes” to largescale deployment. And a wireless charging solution that is small enough, stable enough, and adaptable enough is becoming the essential infrastructure for achieving full autonomy.

As a national “Specialised and Sophisticated” Little Giant enterprise, ZoneCharge remains focused on the scenariobased deployment of magnetic resonance wireless charging technology. We continue to pack highpower, longdistance, highefficiency wireless power capabilities into eversmaller modules, so that every small intelligent device can easily gain autonomous recharging capabilities—accelerating the arrival of fully unmanned intelligent operations across all scenarios.