The likely cause is that your jetpack and battery aren't onboarded properly, which means that they are still in restricting factory settings and not running on full power. To unlock their full power they need to be onboarded (activated), see the steps below (or go to chapter Onboarding your jetboard and battery.)
ONBOARDING PROCEDURE
1) Carefully insert the fully charged battery into your jetboard using the front and rear grips. do not attach the magnet key at this point. If you’ve also received a new jetpack, be sure to install it into the board before inserting the battery.
2) Download and sign into the Radinn app. Register as a new user or login to your existing account. Keep the device closer and follow the steps outlined in the app.
3) When the board is connected to the app it will scan for firmware updates (see chapter "What is a firmware update). When the update is complete the jetpack and the battery will unlock.
4) Do you have more than one battery? Install the additional batteries and repeat steps 1-3.
5) Start making waves!
If you've executed the onboarding procedure but it's still running slow, contact us via Submit a request and we'll support you.