rapids/docs/features/phone-battery.md

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2020-11-06 02:12:14 +01:00
# 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
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!!! info "Available time segments and platforms"
- Available for all time segments
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- Available for Android and iOS
!!! info "File Sequence"
```bash
- 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
!!! note "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.