We sorry to hear you are having issues with your battery, I will guide you through some troubleshooting steps to help resolve this and get your kit working again as soon as possible!
Firstly, could you please re-set the Power Pack back to its default settings using the below video as a guide:
Or following these step by step instructions:
These actions are to be performed on the Power Pack whilst it is turned on:
1) Hold down + & O
2) 'DEF - N' will appear on screen
3) Press + to show 'DEF - Y'
4) Hold down O for 5 seconds
5) 'DEF - 00' will appear on screen
6) Screen will automatically re-alight
7) Swytch kit successfully re-set
Second, could you please check out the following video so we can be 100% certain that everything is connected properly and eliminate this as a cause of the issue you are experiencing.
Between these three videos we should be able to resolve you issue, but if for any reason this does not resolve your issue please let us know by emailing firstname.lastname@example.org and we will find a solution for you.