⚡ 瓦时计算器（功率×时间、电池 V×Ah、续航时间）Watt-Hour Calculator (Power × Time, Battery V × Ah, Runtime)

使用说明与常见问题How-to & FAQ

「瓦时计算器（功率×时间、电池 V×Ah、续航时间）」是什么？What is the Watt-Hour Calculator (Power × Time, Battery V × Ah, Runtime) tool?

计算电能：功率 × 时间，或电池电压 × 容量（Ah 或 mAh），或由 kWh 换算；结果给出 Wh、kWh、焦耳，并可填负载功率和效率估算续航时间。本地处理。Calculate energy as power × time, as battery voltage × capacity (Ah or mAh), or from kWh. Results in Wh, kWh and joules; add a load power and efficiency to estimate the runtime. Processed locally.

如何使用「瓦时计算器（功率×时间、电池 V×Ah、续航时间）」？How do I use the Watt-Hour Calculator (Power × Time, Battery V × Ah, Runtime) tool?

在「瓦时计算器（功率×时间、电池 V×Ah、续航时间）」中，填写「已知」、「功率（W）」、「时间（小时）」、「电压（V）」、「容量」等参数，结果会随输入实时计算并显示在下方。In the Watt-Hour Calculator (Power × Time, Battery V × Ah, Runtime): Fill in "Known", "Power (W)", "Time (hours)", "Voltage (V)", "Capacity"; results are recalculated instantly as you type.

充电宝的 Wh 怎么算？How do I find a power bank's Wh?

用电芯电压（通常 3.6–3.7 V）乘以容量（Ah）：10,000 mAh × 3.7 V = 37 Wh。标在外壳上的 mAh 通常是电芯容量，不是 5 V 输出时的容量。Multiply the cell voltage (usually 3.6–3.7 V) by the capacity in Ah: 10,000 mAh × 3.7 V = 37 Wh. The mAh printed on the case is normally the cell capacity, not the capacity at the 5 V output.

能举个计算实例吗？Can you show a worked example?

例如在「瓦时计算器（功率×时间、电池 V×Ah、续航时间）」中填 已知 = 电池电压和容量，电压（V） = 3.7，容量 = 5000，容量单位 = mAh，结果区显示：电能：18.5 Wh；千瓦时：0.0185 kWh；焦耳：66,600 J；ℹ Wh = 电压 × 容量（Ah）；mAh ÷ 1000 = Ah。航空托运常用 100 Wh 作为充电宝限值For example, entering Known = Battery voltage and capacity, Voltage (V) = 3.7, Capacity = 5000, Capacity unit = mAh in the Watt-Hour Calculator (Power × Time, Battery V × Ah, Runtime) gives: Energy: 18.5 Wh; Kilowatt-hours: 0.0185 kWh; Joules: 66,600 J; ℹ Wh = voltage × capacity (Ah); mAh ÷ 1000 = Ah. Airlines commonly use 100 Wh as the power-bank limit

哪些输入会被检查？Which inputs are validated?

「瓦时计算器（功率×时间、电池 V×Ah、续航时间）」会检查这些输入——「功率（W）」：须大于 0且不大于 1,000,000,000,000；「时间（小时）」：须大于 0且不大于 1,000,000；「电压（V）」：须大于 0且不大于 1,000,000；「容量」：须大于 0且不大于 1,000,000,000；「千瓦时（kWh）」：须大于 0且不大于 1,000,000,000,000；「负载功率（W，可选）」：可留空；填写时须大于 0且不大于 1,000,000,000,000；「效率（%，可选，默认 100）」：可留空；填写时须大于 0且不大于 100；绝对值超过 10¹⁵ 的数也会被拒绝。不符合时结果区显示具体提示，不会给出数字。The Watt-Hour Calculator (Power × Time, Battery V × Ah, Runtime) checks its inputs — "Power (W)": must be more than 0 and at most 1,000,000,000,000; "Time (hours)": must be more than 0 and at most 1,000,000; "Voltage (V)": must be more than 0 and at most 1,000,000; "Capacity": must be more than 0 and at most 1,000,000,000; "Kilowatt-hours (kWh)": must be more than 0 and at most 1,000,000,000,000; "Load power (W, optional)": optional; if given it must be more than 0 and at most 1,000,000,000,000; "Efficiency (%, optional, default 100)": optional; if given it must be more than 0 and at most 100; numbers above 10¹⁵ in absolute value are rejected too. When a value fails, the result area names the problem instead of showing a number.

有哪些选项可以调整？What options can I adjust?

「瓦时计算器（功率×时间、电池 V×Ah、续航时间）」的设置：「已知」可选 功率和时间、电池电压和容量、千瓦时（默认 电池电压和容量）；「功率（W）」默认 100；「时间（小时）」默认 5；「电压（V）」默认 3.7；「容量」默认 5000；「容量单位」可选 mAh、Ah（默认 mAh）；「千瓦时（kWh）」默认 0.5；「负载功率（W，可选）」可留空；「效率（%，可选，默认 100）」可留空。每次生成结果都按当前设置处理。Settings in the Watt-Hour Calculator (Power × Time, Battery V × Ah, Runtime) — "Known": Power and time, Battery voltage and capacity, Kilowatt-hours (default Battery voltage and capacity); "Power (W)" default 100; "Time (hours)" default 5; "Voltage (V)" default 3.7; "Capacity" default 5000; "Capacity unit": mAh, Ah (default mAh); "Kilowatt-hours (kWh)" default 0.5; "Load power (W, optional)" optional; "Efficiency (%, optional, default 100)" optional. The result always uses the current settings.

计算结果可以用于作业或工程吗？Can I use the results for homework or engineering?

「瓦时计算器（功率×时间、电池 V×Ah、续航时间）」使用教科书标准公式（公式写在说明和常见问题中），适合学习和估算核对；涉及安全的工程设计请以规范和实测为准。The Watt-Hour Calculator (Power × Time, Battery V × Ah, Runtime) uses standard textbook formulas (given in the description and FAQ), which is good for learning and checking estimates; for safety-critical engineering follow codes and measured values.

「瓦时计算器（功率×时间、电池 V×Ah、续航时间）」免费吗？需要注册吗？Is the Watt-Hour Calculator (Power × Time, Battery V × Ah, Runtime) free? Do I need an account?

「瓦时计算器（功率×时间、电池 V×Ah、续航时间）」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Watt-Hour Calculator (Power × Time, Battery V × Ah, Runtime) is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.