Phone Battery

Sensor parameters description for [PHONE_BATTERY]:

Key	Description
[TABLE]	Database table where the battery data is stored
[EPISODE_THRESHOLD_BETWEEN_ROWS]	Difference in minutes between any two rows for them to be considered part of the same battery charge or discharge episode

RAPIDS provider

Available time segments and platforms

• Available for all time segments
• Available for Android and iOS

File Sequence

- data/raw/{pid}/phone_battery_raw.csv
- data/interim/{pid}/phone_battery_episodes.csv
- data/interim/{pid}/phone_battery_episodes_resampled.csv
- data/interim/{pid}/phone_battery_episodes_resampled_with_datetime.csv
- data/interim/{pid}/phone_battery_features/phone_battery_{language}_{provider_key}.csv
- data/processed/features/{pid}/phone_battery.csv

Parameters description for [PHONE_BATTERY][PROVIDERS][RAPIDS]:

Key	Description
[COMPUTE]	Set to True to extract PHONE_BATTERY features from the RAPIDS provider
[FEATURES]	Features to be computed, see table below

Features description for [PHONE_BATTERY][PROVIDERS][RAPIDS]:

Feature	Units	Description
countdischarge	episodes	Number of discharging episodes.
sumdurationdischarge	minutes	The total duration of all discharging episodes.
countcharge	episodes	Number of battery charging episodes.
sumdurationcharge	minutes	The total duration of all charging episodes.
avgconsumptionrate	episodes/minutes	The average of all episodes’ consumption rates. An episode’s consumption rate is defined as the ratio between its battery delta and duration
maxconsumptionrate	episodes/minutes	The highest of all episodes’ consumption rates. An episode’s consumption rate is defined as the ratio between its battery delta and duration

Assumptions/Observations

1. We convert battery data collected with iOS client v1 (autodetected because battery status 4 do not exist) to match Android battery format: we swap status 3 for 5 and 1 for 3
2. We group battery data into discharge or charge episodes considering any contiguous rows with consecutive reductions or increases of the battery level if they are logged within [EPISODE_THRESHOLD_BETWEEN_ROWS] minutes from each other.