Garmin · Connected wearables
Garmin vívofit 4 battery
2 × 1.55V silver oxide button cell
Garmin vívofit 4 / vivofit 4 takes two SR43 silver-oxide cells — Garmin lists 301 and 386 as the same family. This is not the CR1632 used in vívofit 3. Remove the band, undo the four front screws, replace both cells, and align the marks when refitting.
How to replace it
| How to open | Remove device from band; remove four Phillips screws on front; remove front cover and batteries |
|---|---|
| Tools | Small Phillips screwdriver |
| Orientation | Negative side facing the inside of the front cover |
| Seal / O-ring | Gasket tabs must align with notches in battery case; damaged gasket may not seal |
| Notes | Replacing batteries does not erase data or settings. Low-battery alert appears in Garmin Connect after sync. Mark on device must align with mark inside band. |
| Access | Simple screwdriver |
| Gasket / O-ring present | Yes |
Important
- Garmin states 301 and 386 batteries are equivalent to SR43.
Sources
Helpful for this device
Optional tools for opening, testing or charging — separate from the battery answer.
- iFixit Essential Electronics Toolkit
Opening compartments that need precision bits
- Fluke 101 Digital Multimeter
Accurate open-circuit voltage and basic electrical checks
- Digital multimeter
Measure open-circuit voltage and general electronics checks
New battery but still not working?
A fresh 2 × SR43 should restore Garmin vívofit 4 if the battery was the problem. Work through the checks below before replacing the device.
- Check orientation
Confirm the cell is seated correctly: Negative side facing the inside of the front cover
- Check the battery type
This device needs 2 × SR43 (silver_oxide). Rechargeable cells are not supported for this device. Same size does not always mean the same battery.
- Check known model-specific issues
Gasket tabs must align with notches in battery case; damaged gasket may not seal Garmin states 301 and 386 batteries are equivalent to SR43.
- Confirm the battery itself
For most coin cells, fitting a known-good fresh cell of the correct code is simpler than capacity testing.
- Still not responding?
If a correct, fresh battery installed properly does not restore the device, the fault may be elsewhere — the device may need service or replacement.