{"id":16706,"date":"2025-12-11T02:05:00","date_gmt":"2025-12-11T02:05:00","guid":{"rendered":"https:\/\/www.leerervape.com\/?p=16706"},"modified":"2025-12-11T03:35:02","modified_gmt":"2025-12-11T03:35:02","slug":"donuts-battery-usb-c","status":"publish","type":"post","link":"https:\/\/www.leerervape.com\/en\/blogs\/donuts-battery-usb-c\/","title":{"rendered":"The evolution of donut batteries: From 510-pen to USB-C high-tech (2025 guide)"},"content":{"rendered":"

The evolution of the donuts battery<\/strong>: from basic pen to high-tech solution<\/h1>\n\n\n\n

Summary:<\/strong> When B2B buyers in the USA search for \"donuts battery<\/strong>,\" they are usually looking for 510-thread batteries or disposable AIO (all-in-one) devices in \"Donuts\" series. In just a few years, the market has evolved from simple 350 mAh pen-style batteries to USB-C-enabled, display-equipped, and standards-compliant systems \u2013 with clear requirements for safety (UL 8139), transport (UN 38.3), and cell standards (IEC 62133-2). IEC Webstore+4SDesignLLC+4Looma+4<\/a><\/p>\n\n\n\n

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1) Phase \u201cBasic\u201d: 510 pen, 1 button, micro USB<\/h2>\n\n\n\n

The first wave of donut battery<\/strong> demand came with slim 510-threaded batteries (typically ~350 mAh<\/strong>), 3 voltage levels, and simple USB charging adapters \u2013 robust enough for standard cartridges, but without telemetry or protection logic beyond the bare minimum. A typical retail example perfectly matches this description. SDesignLLC<\/a><\/p>\n\n\n\n

Implications for B2B:<\/strong> Affordable and suitable for mass production, but limited battery life, no USB-C, and little differentiation at the point of sale.<\/p>\n\n\n\n

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2) Phase \"Tuning\": Preheating, variable voltage & improved drivers<\/h2>\n\n\n\n

With thicker filling materials, the demands on donuts battery<\/strong> batteries increased: preheating profiles, finer voltage levels, and more stable step-up\/step-down drivers became standard. The result: fewer \"burnt hits,\" more consistent performance, and lower return rates in retail.<\/p>\n\n\n\n

Implication for B2B:<\/strong> SKU planning should be based not only on capacity (mAh), but also on power output curves<\/strong> and preheat profiles<\/strong>.<\/p>\n\n\n\n

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3) \u201cHigh-Tech\u201d phase: USB-C, display & energy management<\/h2>\n\n\n\n

The switch to USB-C<\/strong> has shortened charging times, increased compatibility, and reduced complaints about charging cables. This trend is driven by clear EU regulations that mandate USB-C as the common charger<\/strong> for major electronics segments starting at the end of 2024<\/strong> \u2013 manufacturers are aligning their port roadmaps accordingly, even though e-cigarettes are not explicitly addressed. In parallel, LED\/mini-displays<\/strong> (battery level, puff counter, boost mode) and larger batteries (> 500\u2013600 mAh) are appearing in AIO (all-in-one) series. A product listing featuring Type-C<\/strong> and 600 mAh illustrates this trend. European Parliament+1<\/a><\/p>\n\n\n\n

Implications for B2B:<\/strong> USB-C as a minimum requirement in RFQs; displays increase the perceived value per device and support premium pricing positions.<\/p>\n\n\n\n

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4) Security becomes a \"license to operate\".<\/h2>\n\n\n\n

4.1 UL 8139 (Device System Safety)<\/strong>
UL 8139 evaluates electrical\/heating systems, batteries, and charging circuits<\/strong> specifically for e-cigarettes\/vapes. In North America, this standard is considered the industry benchmark and is recognized by ANSI\/SCC. The FDA<\/strong> associates UL 8139 compliance with a significantly reduced risk<\/strong> of battery-related incidents. Therefore, UL 8139 is a \"must-have\" for any serious donuts battery<\/strong> roadmap. UL Solutions+2<\/a><\/p>\n\n\n\n

4.2 UN 38.3 (Transport Tests + Test Summary)<\/strong>
For air, sea, and road transport, UN 38.3<\/strong> certification is mandatory; since 2022<\/strong>, the Lithium Battery Test Summary<\/strong> must also be included \u2013 updated in 2024<\/strong>. Without UN 38.3 certification, shipments risk delays or rejection. PHMSA<\/a><\/p>\n\n\n\n

4.3 IEC 62133-2 (Cell\/Battery Safety)<\/strong>
For portable, sealed secondary lithium cells<\/strong>, IEC 62133-2 defines requirements\/tests for safe use and foreseeable misuse \u2013 a core component for cell\/pack approvals globally. IEC Webstore<\/a><\/p>\n\n\n\n

Implication for B2B:<\/strong> When reviewing offers, always check for UL 8139 report<\/strong>, UN 38.3-TS<\/strong> and, if applicable, IEC 62133-2<\/strong> for serial number, cell, and model matching.<\/p>\n\n\n\n

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5) Architectural trends in practice<\/h2>\n\n\n\n