power.md

layout	title	permalink	sequence	power
power	Power	/power	6	tree components calculation source battery_life charging_duration charging_instruction false false false <code>4200mAh</code> 18650 button-top battery 14 hours 14 hours Just plug in the USB cable to the Oak PCB that has the 18650 battery in the holder at the back. RED Charging LED will light up when charging. The battery will be fully charged when the RED Charging LED turns off.

Charging the battery

The multimeter with data logging feature was hooked up to the test points of VBAT and GND. It took about 11 hours to fully charge the battery with the on-board charging circuit.

Measuring battery life

Two types of firmware was uploaded to measure the longest possible and shortest possible battery life:

1. Longest possible: Blinky LED was 19 hours
2. Shortest possible: Demo was 14 hours