Donuts Switch V3 2g (1g+1g) — Digital Screen, USB-C Specs & QC Checklist (2025 Guide)

You get two chambers (1g+1g) with the Donuts Switch V3 2g disposable vape. This device integrates a digital LED screen and a USB-C rechargeable 320 mAh battery, in a postless, leak-resistant construction. This guide explains the technical specs, unique features, switch logic and risk points, and a practical QC checklist you can actually run in 2025. Expect a structured breakdown and clear steps on how to verify authenticity and compliance before filling, before POs, and before shipment.

Specs Table

Device Dimensions & Weight

Compact pocketable form factor designed for daily carry. Exact size and mass are to be confirmed by supplier or third-party. Keep placeholders in your PDP until verified.

E-liquid Capacity & Chamber Structure

Total fill mass: 2 g (1 g + 1 g). Note: grams refer to oil mass; volume varies by formulation and viscosity (do not assume mL = g without density data). Two physically separated chambers reduce cross-flavor contamination when switching. Seal materials and rating: TBC. Always verify compatibility with your intended oil (terpene load, viscosity, and solvent profile).

Battery & Charging Specs

Fast, reversible USB-C improves user convenience and reduces wear. Confirm charge cut-off, termination current, and low-temperature charge behavior during validation.

Coil & Heating Element

Ceramic heating element targeted for viscous oils. Per-chamber resistance, wire gauge, and recommended operating power are TBC and should be listed on your vendor spec sheet or third-party test report.

Screen Features

Digital LED shows essential runtime info to reduce guesswork.

Note: All technical specs are for evaluation only. Publish final values only after supplier confirmation or independent verification.

Unique Features

Dual-Chamber Switch Logic

Two isolated chambers allow single-flavor or alternating use. The physical selector routes airflow to the chosen chamber; users get variety without swapping devices.

Digital LED Display

At-a-glance battery status and puff count support predictable usage and charging behavior. Validate iconography and error states against your firmware build.

USB-C Rechargeable Battery

Standard 5 V USB-C charging. Confirm connector retention force, ESD robustness, and cable interoperability (E-marked vs non-E-marked) during OQC.

Leak-Proof Postless Design

Postless layout reduces stacked interfaces and potential capillary leak paths. Still, seal material, torque windows, and assembly tolerances must be validated to keep leak rates low across temperature/pressure cycles.

Activation Modes (Auto-Draw/Button/Preheat)

Supported modes are supplier dependent. Document the exact SKU behavior (e.g., auto-draw only; button+preheat) and align user instructions and QC steps accordingly.

Flavor Options

Two chambers enable complementary flavor paths or contrast profiles. Final flavor lists and naming are brand-dependent—treat any matrix as illustrative until the supplier publishes the official catalog.

Switch Mechanism & Risks

How Dual-Chamber Switching Works

A mechanical selector (or internal valve) shifts the active airflow/oil path to chamber A or B. Keep a labeled diagram showing the airflow route and seals; this also helps operators during incoming inspection.

User Logic & Operation

User selects a chamber (toggle/slider/button), confirms on the display icon, then inhales (auto-draw) or presses fire (button variants). Include a one-page quick-start in the master carton.

Risks Compared to Single-Chamber

More moving parts and seals increase potential failure points (stiction, misalignment, seal creep). Treat these as design trade-offs, not deal-breakers—mitigate through tighter tolerances and targeted QC.

QC Implications

Plan additional checks for selector feel, seal integrity, and chamber isolation. Add switch-cycle endurance sampling to IPQC.

Safety & Compliance Standards

UL 8139 Overview

UL 8139 evaluates electrical/heating/charging safety for vaping devices. Use phrasing like “evaluated to/with reference to UL 8139” rather than implying legal certification. Collect report numbers, scope, and sample IDs.

IEC 62133-2 Overview

IEC 62133-2 covers rechargeable lithium cell/battery safety at the design and test levels. Confirm chemistry, cell supplier, protection circuits, and abuse test outcomes via authentic documentation.

Compliance language: avoid “approved/certified” claims unless you possess valid, scope-matched certifications.

Transport & Packaging Compliance

UN38.3 Test Summary

Obtain the official UN 38.3 Test Summary for the exact cell/battery used (not a generic one). Verify the eight-test matrix (T.1–T.8) is complete and references your cell model and manufacturer.

IATA DGR 2025 Guidelines

Lithium-powered devices are regulated as dangerous goods. Check applicable UN number, packing instruction, SoC limits, marking/labeling, and operator variations. Some carriers impose stricter rules—always confirm before booking.

ISTA 3A Packaging Test

Use ISTA 3A to simulate parcel networks (drop, random vibration, optional low pressure). Publish pass/fail criteria and include photos of the tested packout (inner tray, void fill, corner protection).

Child-Resistant Packaging

If your market requires reclosable child-resistant features, reference ISO 8317. Verify supplier certificates and ensure closures remain functional after repeated openings.

Quality Control Checklist

QC Levels & Sampling

Adopt ISO 2859-1 (AQL) sampling. Typical approach: General Inspection Level II; set AQLs by risk—e.g., Critical 0/1.0, Major 1.0–2.5, Minor 2.5–4.0 (final numbers per your SOP).

Defect Definitions

• Critical: leaks, electrical short, thermal event, charge failure.

• Major: display faults, selector malfunction, airway blockage.

• Minor: small cosmetic scuffs, minor print misalignment.

Visual & Assembly Inspection

Check shell gaps, fastener torque windows, port alignment, weld/solder quality, print clarity, lot/serial legibility.

Leak & Aging Tests

Run room-temp soak, thermal cycling (hot/cold), and pressure/vacuum leak screens. Consider brief vacuum hold and post-stress re-inspection for latent leaks.

Screen & Firmware Checks

Verify battery icon thresholds, puff counter consistency, error code triggers, and refresh behavior. Log firmware build IDs per batch.

Charging Port Verification

Test connector retention (pull/rock), insertion cycles, and compatibility with typical 5 V adapters/cables. Confirm over-charge protection and charge termination.

Authenticity & Verification Steps

Before Filling

Do air-tightness/selector isolation checks; run screen self-test; record lot and serials. If QR/SN verification exists, validate a random sample.

Before Purchase Order

Request golden sample + UN38.3 TS, UL/IEC statements (scope-matched), and a spec sheet with tolerances. Confirm screen/firmware behavior is the version you expect.

Before Shipment

Review ISTA 3A packaging report, packing list with serial ranges, and perform outbound sampling for leaks, display, selector feel, and USB-C function.

2025 Update

Regulatory Trends

Expect continued operator variations under IATA DGR for lithium devices, more carriers requiring digital documentation, and stricter SoC controls. Build a standing checklist you can update quarterly.

Vendor Docs Checklist

UN 38.3 Test Summary · IEC 62133-2 report/statement · UL 8139 evaluation/statement · MSDS · ISTA 3A report · Batch/serial list · (Optional) COA.

References

• UL 8139 (electrical/heating/charging safety for vaping devices)

• IEC 62133-2 (rechargeable lithium cells/batteries—safety)

• UN 38.3 (design tests for lithium battery transport; Test Summary requirement)

• IATA DGR 2025 (dangerous goods by air—lithium battery sections)

• ISTA 3A (parcel delivery simulation—drop/vibration/low pressure)

• ISO 2859-1 (AQL sampling) · ISO 8317 (child-resistant reclosable packaging)

Summary
Donuts Switch V3 combines dual-chamber 1g+1g flexibility with a digital LED screen, USB-C 320 mAh convenience, and a postless structure designed to limit leak paths. Treat this guide as your operational backbone: validate specs, run the QC checklist, and insist on authentic safety/transport documentation. That’s how you ship reliably—and compliantly—in 2025.