Name: Battery Guesstimate
Rating: 4.6 (50 reviews)
Author: individual-it

1. Shows the battery charge over time (including Solar charge if available)
2. Estimates how long the battery would last (better than the build-in estimation)
3. Notifies the phone when a set threshold is reached during charging (to extend the battery lifetime)
4. Export battery data to cloud-storage: https://github.com/individual-it/BatteryGuesstimate/#export

If you want to help me to further improve this app you have multiple options:
- write come code: https://github.com/individual-it/BatteryGuesstimate/
- tell others about the app
- send some € to https://www.buymeacoffee.com/individualit or https://www.paypal.com/donate/?hosted_button_id=UZXJZNRXL25H8

WHY YOU NEED IT

I don't know exactly how Garmin predicts how long the battery of a watch would last, but I have been unhappy with that prediction. Specially during power-draining activities the battery on my Instinct2 is drained much quicker than predicted. This app tries to solve that problem.

During a longer activity you can check how much battery charge you have lost so far in the last x minutes/hours and see how long your battery would last if you keep on using it the same way.

Also, it can help you extend the overall battery lifetime by configuring a charging threshold!

HOW IT WORKS

The battery status is collected every 15min in the background and this date is used to
1. show the battery charge/discharge over time
2. calculate how long the battery might last
3. show a graph of the battery status
4. notify the user when the battery reached a specific level during charging (off by default)

USAGE

- add the app to your glance carousel
- the glance view shows the charge/discharge in the last 15/30 min and prediction based on that data
- in the glance view press the GPS button to view details of different time periods
- in the details view use the UP/DOWN buttons to cycle through the different time periods
- in the details view press the GPS button to view the battery graph
- in the graph view use the UP/DOWN buttons to cycle through the different time periods
- set the charging threshold through the Connect IQ app to receive a notification when the battery reached a specific level

DIFFERENT PREDICTIONS

Read about it here: https://github.com/individual-it/BatteryGuesstimate/tree/master#different-predictions-of-how-much-longer-the-battery-will-last

CHARGING THRESHOLD

Setting the `Battery Charge Threshold` to a value higher than 0 will cause the watch to send a notification to the phone when reaching that value during charging.
The check happens every 15min, so you might want to set the threshold to a relatively low value. Depending on your watch and the charger the charging time might be pretty short, so by the time the check happens the battery might have already charged to a much higher value.

The notification is actually a hack! There is no easy way to send a notification to the phone without creating a whole companion app. The hack is to request the phone to open a website. When the set threshold is reached the phone will display a notification saying that Garmin IQ wants to open the website `http://battery-level-reached.garmin`.
On an Android phone you can use Tasker (https://play.google.com/store/apps/details?id=net.dinglisch.android.taskerm&hl=en) together with AutoNotification (https://play.google.com/store/apps/details?id=com.joaomgcd.autonotification&hl=en) to intercept the notification and to display something more sensible. Import  this tasker profile & task for that: https://raw.githubusercontent.com/individual-it/BatteryGuesstimate/master/Garmin_BatteryGuestimate.prf.xml

PERMISSIONS

- run in the Background: needed to check the battery status every 15min
- Send/receive information to/from the Internet: needed to send the notification to the phone and for the export function