For Fitbit Versa 3 （FB511 ） Smart Fitness Watch. For Fitbit SENSE（FB512 ） Smart Fitness Watch. Battery Model: 3.85 V 266 mAh 1.02 Wh. 1 x 260 mAh = Battery.
This product would be ideal for individuals who frequently charge their Fitbit Versa 3 and SENSE watches but want an extra reliable and high-capacity battery to ensure uninterrupted use.
