Power consumption on the micro:bit
The micro:bit v2 V2 board revision has a range of modes that enable us to conserve power, for example when the board is not being used or when it is powered by battery pack.
Board is fully operational. The nRF52 and KL27 will try and conserve power if they can. Power LED is lit.
Put the nRF52 to sleep when instructed by CODAL. Wake when USB is connected, reset is pressed or instructed to by CODAL.
On USB - Press and hold power/reset for 5 seconds to enter sleep. The micro:bit power LED will dim from bright red to off. It will then flash on/off, showing you that it is still connnected to the power source. Press power/reset to wake up.
Removing the USB power cable and re-adding it will also wake the micro:bit
Power off the device. Triggered by pressing and holding the reset button.
On battery - Press and hold power/reset for 5 seconds to power off the micro:bit. The micro:bit power LED will dim from bright red to off. It will then remain off until you press the power/reset to wake up.
Inserting a USB power lead will also wake the device.
The LED display on the V2 board revision is also brighter than previous revisions, so when using at full brightness you will notice faster battery rundown than an equivalent program on a v1 board.
See our tips on prolonging battery life