The evolution of the donuts battery: from basic pen to high-tech solution

Summary: When B2B buyers in the USA search for "donuts battery," 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 – with clear requirements for safety (UL 8139), transport (UN 38.3), and cell standards (IEC 62133-2). IEC Webstore+4SDesignLLC+4Looma+4

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1) Phase “Basic”: 510 pen, 1 button, micro USB

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

Implications for B2B: Affordable and suitable for mass production, but limited battery life, no USB-C, and little differentiation at the point of sale.

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2) Phase "Tuning": Preheating, variable voltage & improved drivers

With thicker filling materials, the demands on donuts battery 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.

Implication for B2B: SKU planning should be based not only on capacity (mAh), but also on power output curves and preheat profiles.

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3) “High-Tech” phase: USB-C, display & energy management

The switch to USB-C 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 for major electronics segments starting at the end of 2024 – manufacturers are aligning their port roadmaps accordingly, even though e-cigarettes are not explicitly addressed. In parallel, LED/mini-displays (battery level, puff counter, boost mode) and larger batteries (> 500–600 mAh) are appearing in AIO (all-in-one) series. A product listing featuring Type-C and 600 mAh illustrates this trend. European Parliament+1

Implications for B2B: USB-C as a minimum requirement in RFQs; displays increase the perceived value per device and support premium pricing positions.

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4) Security becomes a "license to operate".

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

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

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

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

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5) Architectural trends in practice

• Protection circuits: two-stage OVP/UVP, OCP, OTP (NTC), short-circuit latch, "soft-start" against inrush current.
• Cell selection: from small pouch cells (~280–400 mAh) to larger pouch/cylindrical form factors with > 500 mAh; charging ICs with improved CV hold and thermal derating.
• Telemetry: simple fuel gauge → percentage display/icons; Boost/Eco modes for viscous/low-viscosity fluids.
• Interfaces: USB-C is the established standard, MagSafe adapters are less common; charging specifications are typically 5V/1A.

Market evidence: Retailer listings for "Donuts" series products show a range from 350 mAh basic to 600 mAh USB-C AIO – this is the range you should consider in your RFQs. SDesignLLC+1

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6) Supply chain & documentation: What purchasing should demand

1. UL 8139: Complete test report (model and PCB revision identifiable). UL Solutions
2. UN 38.3: Test Summary (TS) mit Serien-/Zell-IDs; Produktions- und Prüfdatum prüfen. PHMSA
3. IEC 62133-2: Cell certification + CB Scheme, where relevant. IEC Webstore
4. USB-C concept: Connector lifespan, E-Marker (if necessary), cable inclusion policy – ​​market trend supported by the EU Common Charger regulation. European Parliament
5. Life Test & RMA Clauses: Charge cycle target values, pre-aging protocols, failure rate (e.g., ≤ 0.5–1.0%).
6. Labeling: Capacity (mAh), voltage, recycling symbols, TS notice, charging parameters.

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7) SEO tip (DACH): How to use "donuts battery" effectively

• H1/H2 in German, keyword donuts battery in H1 + 1–2 times in the body text;
• German technical terms ("disposable batteries," "510-thread battery") are used for readability;
• Support your data claims with standard/rule sources (see citations) – this increases E-E-A-T.

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8) Fazit

The donuts battery has evolved from a simple 510-pin battery to a high-tech subsystem: USB-C, intelligent charging/protection ICs, telemetry, and – crucial for B2B – verifiable compliance with UL 8139, UN 38.3, and IEC 62133-2. Today's buyers evaluate not only mAh capacity, but also safety and charging architecture, documentation, and point-of-sale added value (display/boost). This minimizes RMA risks and creates the foundation for predictable re-orders in regulated markets. UL Solutions+2PHMSA+2

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Sources (selection)

• UL: E-Cig and Vape Battery and Electrical Certification / UL 8139 (ANSI/SCC recognized). UL Solutions+1
• FDA Guidance: UL 8139-compliant devices with reduced battery risk (PDF). U.S. Food and Drug Administration
• PHMSA (DOT): Lithium Battery Test Summary – UN 38.3 (updated Jul 2024). PHMSA
• IEC: IEC 62133-2:2017 (portable lithium-ion cells/batteries – safety). IEC Webstore
• Market examples: 350 mAh 510-Pen (Rainbow Donuts), 600 mAh Type-C AIO (Vapin’ Donuts 7000). SDesignLLC+1
• EU Parliament: USB-C Common Charger from the end of 2024 for broad electronics segments. European Parliament

Note: "donuts battery" is a trade/SEO term; the normative statements above refer generically to e-cigarette batteries and AIO devices, regardless of brand series.

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