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标称功率越大，变压器型转换器越重（3000W变压器普遍5-8kg），旅行携带极不现实；出国短途应优先购买当地110V/220V版本电器，而非携带大功率转换器

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Unverified便携性与功率不可兼得：1000W以上大功率变压器普遍重达3-8kg，不适合行李箱携带，短途旅行选择功率<300W的小型电子变压器86% similar Unverified功率越大变压器越重，1000W环形变压器普遍重达3-5kg，2000W可达8kg以上，不适合随身携带出行，仅适合固定放置在住所使用；旅行携带优先选小功率电子式（开关电源型）83% similar Unverified纯转换器不变压，仅支持宽压（100-250V）电器直接使用；如果携带的是110V专用电器去220V国家，仍需额外变压器83% similar Unverified双向升降压设计，既可将110V转220V也可将220V转110V，适合在不同国家间往返携带电器使用81% similar Unverified转换插头额定功率需大于所接设备总功率的1.2倍以上。多数万能转换头额定为10A/2500W（220V），但在110V国家实际承载能力降至约1100W，带电吹风（约1800W）时会过载发烫80% similar

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