Products Part No?LSSP281928 Product Parameters?165mAh /0.63Wh Voltage:3.85V Type:Polymer Packaging:1 x battery?1x tools Compatible model Compatible with Versa 2 Fitness Smartwatch FB507 Important Notes 1.Please double check your device model before purchasing a battery to determine if this battery is compatible with your device. 2.If you don't know how to install it or it's your first time to install it, you can search for installation tutorials on "YouTube", there are a lot of cell phone battery installation tutorials on it.. 3.It is easy to replace old battery with brandnew battery. Please turn off your phone prior to replacement, carefully disconnect your old battery and then connect your new battery to the mainboard, please ensure battery is connected to cellphone well,easily install, no need to worry about the installation is too complicated. 4.It is recommended to fully drain and fully charge the battery especially during the first 3 charging and discharging cycles, doing so may greatly improve the overall life of the battery. Contact us If you have any questions about your order, please contact us and we will help within 24 hours. Hope you have a good day.