How long does the CHARGE for micro:bit Power Pack battery last?

The short answer

• About 56 hours of continuous use, with no power management in your code.
• Up to 8 days when your project uses power management extensions.

That means a single charge comfortably covers a full day of classes — and usually a whole week of lessons.

Why the difference?

Without power management, the micro:bit draws power the whole time the Power Pack is switched on. If a student leaves a project running, you can expect roughly 56 hours before the battery is empty.

Power management extensions let your code put the micro:bit into a low-power state between tasks, so it uses far less energy. With those in place, the same charge can stretch to as long as 8 days.

https://microbit-foundation.github.io/pxt-microbit-v2-power/

Getting the most out of each charge

1. Use the on/off switch on the CHARGE Power Pack to turn projects off at the end of a lesson. This is the easiest way to save battery, and it's a good habit for students to build.
2. Recharge over USB in the classroom — you can keep coding while it charges.
3. If a project needs to run for days at a time (for example, a sensor left monitoring a plant or a room), add power management to the code rather than relying on continuous power.

You can find more details on the CHARGE for micro:bit product page.