Parts & technology
Built-in battery
A built-in battery is permanently integrated into the device housing and charged through its internal circuitry. It simplifies construction but is normally not user-replaceable, so ageing or failure can limit the usable life of the entire device.
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Classification
Built-in battery concerns the power supply and therefore the most safety-critical part of an e-cigarette. Cell chemistry, current rating, protection circuitry and charging method form one unit that cannot be optimised piece by piece. The meaning of Built-in battery shifts depending on whether marketing copy, a user manual or a datasheet is using the word.
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Practical relevance
In everyday use, Built-in battery shows up in runtime, charging time and how stable the output stays across a tank filling. Fading capacity, deformation or unusual warmth while charging are warning signs to take seriously. In practice the question about Built-in battery comes up together with Replaceable battery – clarifying one of them usually means half-understanding the other already.
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Handling it safely
Charge Built-in battery only with the released power supply, never unattended and never on a flammable surface. Damaged, swollen or water-exposed cells must be secured immediately and taken to a battery collection point, not to household waste. Nicotine-containing products in connection with Built-in battery are intended exclusively for adults and do not belong in the hands of adolescents.
Note: This content is for general information and does not replace medical or legal advice.
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Not to be confused with
Product copy often puts Built-in battery and 21700 battery in the same sentence, while Replaceable battery describes a different level and must not be equated with them. This differentiation is deliberately descriptive and contains no recommendation as to which variant suits you.
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Frequently asked questions
- What all falls under Built-in battery?
- Built-in battery covers every variant that fulfils the same function within Parts & technology – regardless of what a manufacturer calls it in marketing.
- Can I rely on product specifications for Built-in battery?
- Statements about Built-in battery are subject to labelling requirements for the German market but vary in completeness depending on the sales channel. Imported goods are more often incomplete.
- Is Built-in battery the same as Battery venting?
- No. Built-in battery and Battery venting describe different aspects within Parts & technology and are not interchangeable. Both entries sit side by side in this glossary so the boundary stays visible.
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Official sources and further reading
Sources are highlighted for safety, health, disposal and legal topics. Information may change; current authority guidance and legislation prevail.