Charged monitors the battery status of your fitness sensors and devices — heart rate straps, power meters, radar, electronic shifting, and more — by reading the activity files synced from your Garmin Connect, Wahoo Fitness, or Intervals.icu account. You can also check the battery of Bluetooth-compatible sensors directly from the app.
Open Charged, go to Settings, and choose Connect under the provider you use. You can connect more than one at a time.
Yes — that's the Bluetooth check: the radio-waves icon in the toolbar at the top of your dashboard. Wake the sensor first (wear the strap, spin a crank, or turn a wheel), then tap the icon and Charged will scan for nearby Bluetooth sensors and read their batteries on the spot. You can save a reading so it appears on your dashboard alongside readings from your synced activities. It's handy as a quick pre-ride check, and it's the only way to see battery for some sensors that never report it in activity files — some heart rate straps paired to Wahoo head units, for example.
Open the device's detail view by clicking its card, type a new name, and click Save.
Yes. This can happen when a sensor reports a different name over Bluetooth than it does through a FIT file. Open either card's detail view and use Merge to combine them into one. Merged devices can always be unmerged again later from the same view.
Yes — open the device's detail view and use Hide to remove its card from your dashboard while keeping its history. Note that hiding only affects what you see: a hidden device is still monitored and will still send low-battery alerts.
To remove a single bad data point, open the device's detail view and use the trash icon next to that reading. To retire a device entirely — sold it, stopped using it, or just don't want to see it — open its detail view, type DELETE in the name field, then click the Delete button that appears. Changed your mind? Look for "Undelete previously deleted cards" at the bottom of your dashboard — that lets new readings show up again.
Some devices don't report battery data. Head units (Garmin Edge, Forerunner, and similar) don't report their own battery over the activity file — only the sensors paired to them do. Smartwatches broadcasting heart rate to a head unit are also skipped because many smartwatches are recharged daily.
Charged considers the kind of battery inside each device: a heart rate strap running on a coin cell drains slowly — at 20% it may still have weeks or months of use left, so Charged calls that OK. A rechargeable device like a radar drains its battery faster, and at 20% it might not finish your next long ride, so Charged flags it earlier. Some devices also get product-specific tuning — radar warning levels, for example, are set by how those devices actually behave on real rides. Charged intends Low to mean "charge or replace soon" for every device on your dashboard. Charged may warn you earlier than your device's firmware does, but it will also label a device Low whenever the firmware says so.
Charged reads sensor battery levels from FIT files produced by bike computers and fitness watches. Intervals.icu also accepts activities from apps that save GPX or TCX files instead (Komoot and fitness sync services). Those carry your route but no sensor battery data, so Charged skips them. When your activities are delivered by FIT files recorded by a Garmin, Wahoo, Hammerhead, Lezyne, etc., they'll report batteries as usual for any paired sensors.
Dots that sit off the line come from Bluetooth checks. A Bluetooth check records what the device says its charge is at that moment. Some sensors report in big steps like 100%, 70%, or 30%, so the level may be rounded. The line is built by values reported in synced activities and estimates based on usage. Charged uses your activity history and estimates how the battery actually drained between readings, which aims to be more precise than the rounded values some devices report. A gap between a Bluetooth sourced dot and the line is normal — the dot is the device's own report, the line is Charged's best estimate.
Check that notifications are enabled for Charged in your device settings, and that alerts are turned on in the app under Settings. If you recently changed that toggle, try turning it off and back on.
Yes. On the home screen, the small widget shows a quick status ("All OK" or what needs attention), the medium widget shows battery dials for up to four sensors, and the large widget fits up to twelve. On the lock screen, Charged displays a battery status panel below the clock showing the sensor that most needs attention, or a one-line summary right by the clock. Add them the usual way: press and hold your home or lock screen and look for Charged in the widget gallery. Tapping any widget opens your dashboard.
In the app, go to Settings → Delete Account. See our account deletion page for details.
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