At SXmini, we believe a strong brand is not built only on success, but also on how it responds to challenges. Over the years, SXmini has worked with partners, distributors, retailers, and users across many countries and markets. From the beginning, our goal has always been clear: to create reliable, well-designed vaping products powered by advanced YiHi chipset technology, while listening closely to real user feedback. Like any brand focused on long-term growth, we have also faced moments that tested us. Learning from Early Product Challenges In the early stage of the PX Cartridge (Black version), we did not fully consider the wide differences in e-liquid formulas used in different countries. As an open pod system, its compatibility with certain e-liquids was not ideal in some markets. Instead of ignoring these issues, we collected feedback from partners and users worldwide. Our engineering team made continuous improvements, adjusted internal structures, and tested multiple revisions. These efforts finally led to the release of the PX Pro 2 Cartridge, offering much better stability and broader e-liquid compatibility. This process reminded us that real product improvement always starts with listening. Taking Responsibility and Improving Quality Control We also openly acknowledge an issue that occurred with the first batch of Puremax 2, where a battery defect from an upstream supplier caused charging problems in part of the shipment. Once the issue was identified, the battery problem was fully resolved in later production batches, and replacement units were arranged for our partners. More importantly, this experience helped us strengthen supplier screening, battery testing, and quality control…

YiHi Chipset Technology Evolution From E-Vapor Control to Multi-Industry Intelligent Control Solutions In the world of electronic vaporization, the true foundation of user experience has never been appearance or specifications alone, but the depth of control behind the system. YiHi's chipset journey began with a simple question:how to drive vaporization safely, stably, and consistently under real-world conditions. Over more than a decade of continuous development, this focus gradually shaped a control philosophy that now extends beyond e-vapor devices into multiple intelligent control applications. 2014 | The Beginning of Vapor Control In 2014, YiHi introduced the SX300 series chipset, marking its formal entry into electronic vapor control. At this stage, the priority was not complexity, but reliable power output, safety protection logic, and stable handling of different load conditions, laying the groundwork for future high-level control systems. 2015 | High-Precision Temperature Control Enters Mass Production In 2015, YiHi launched the SX350J, SX350J-V2, and SX450J chipsets. These solutions brought high-precision temperature control into mass-production environments, transforming temperature control from a niche concept into a practical and repeatable solution for everyday devices. During this period, YiHi became one of the key global technology solution providers in the electronic vapor industry. 2016 | Wireless Connectivity and System Interaction In 2016, YiHi joined the Bluetooth SIG and introduced wireless connectivity into vapor device chipsets, releasing: SX480J-BT chipset SX485J-BT chipset SX550J-BT chipset Alongside the hardware, YiHi developed its own application, SXi-Q, enabling device status display and parameter interaction. Later, due to regulatory and platform policy changes, the application was discontinued:the iOS version was removed in 2019,…

In 2013, YiHi launched its first original vape chip, the YiHi SX130, marking the beginning of China’s era of original e-cigarette chip innovation. At a time when high-power regulated devices were still in their infancy, we were already shaping the future cloud-chasing market. The YiHi SX200 soon followed, delivering the perfect balance of power and stability, becoming the go-to core chip for many brands. The Sigelei Legend series gained massive orders thanks to the SX200. Next came the YiHi SX220, whose outstanding performance powered legendary iPV devices like the iPV2 and iPV2S, sparking a global trend in compact regulated box mods. The YiHi SX300 entered the main stage of the high-wattage cloud market, adopted by multiple domestic and international brands. Many leading manufacturers — including Dovpo, KSD, SXK, Hotcig, Yosen, and many more — chose the SX300 for their devices, earning strong consumer praise worldwide. Models like the Yosen SX Mod 50W became bestsellers, driven by the chip’s exceptional performance. With the launch of the YiHi SX330, device performance and user experience reached new heights, securing its place in flagship models from Sigelei and Pioneer4You. For years, the SX series chips powered nearly half of China’s high-performance vape market, winning international respect for Chinese manufacturing. Today, SX is more than just a chip — it is a symbol of China’s original vape technology. We believe that innovation drives the future, and technology is the strongest foundation for any brand.