Interrupt-Based Step-Counting to Extend Battery Life in an Activity Monitor

Table 3

Power consumptions and expected battery life using the polling and tap interrupt algorithms.

Supply voltage; 2.99 V	Measure time; (ms)	Consumed energy; (uAh)	Average current; (mA)	Battery life; (minutes)
Polling at 30 ms	60936	20.95	1.24	9690.6
Polling at 50 ms	60519	15.75	0.94	12808.8
Tap interrupt	60012	11.92	0.72	16775.4
Polling at 30 ms with gyroscope	60885	18.99	6.35	1890.6
Tap interrupt with gyroscope	61083	12.47	0.74	16324.8