How does the battery display show remaining time?

The battery fill level drops as time passes, and the colour changes from green to yellow to red as the charge gets low.

Is the battery timer familiar to students?

Yes. Students recognise the battery icon from phones and tablets, making the countdown immediately intuitive without explanation.

Can I set a custom duration for the battery countdown?

Yes. Enter any duration and the battery will drain at the correct rate to reach empty exactly when the time expires.

Battery Timer

A battery that drains as time ticks away.

100%

03:00

Duration

已过

00:00

剩余

03:00

电量

100%

关于

Battery Timer shows a vertical battery gauge that drains from full to empty as the countdown progresses. Colour-coded segments shift from green through yellow and orange to red, and the charge percentage is displayed right on the battery. Because the metaphor is instantly recognisable, students and audiences can tell at a glance how much time is left without reading numbers.

使用方法

Select a countdown duration from the preset buttons.
Press Start — the battery begins draining.
Colour shifts as segments empty: green → yellow → orange → red.
The percentage overlay and stats row update each second.
When fully drained a notification sound plays.

常见问题

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Battery Timer

关于

使用方法

常见问题

Can I see the battery from across the room?

What happens when it reaches zero?

Does it affect my device's actual battery?

Related Tools

Battery Timer

关于

使用方法

常见问题

Can I see the battery from across the room?

What happens when it reaches zero?

Does it affect my device's actual battery?

Related Tools