This 3.7V 36mAh Li-Polymer battery is a compatible replacement for FitBit Alta. Compare the number printed on your current battery, its voltage, chemistry, dimensions and connector before ordering.
Included: One replacement battery pack.
Battery specifications
| Voltage | 3.7V |
| Capacity | 36mAh |
| Chemistry | Li-Polymer |
| Energy | 0.13Wh |
| Dimensions | 16.00 x 10.40 x 4.40mm |
| Battery weight | 1g /0.04 oz |
Replacing your FitBit Alta battery
Compare the connector shape, wire arrangement and polarity with your original battery. Check all listed specifications; a similar model name or matching voltage alone does not confirm a fit.
Compatible equipment models
FitBit Alta
Replacement battery numbers
FitBit FB406