Hello ItIsJugg,
Thank you for using Apple Support Communities and for sharing these details with us. Sounds like you're experiencing issues when trying to use your MagSafe Battery Pack. If so, we' like to help out. The best approach to take is to attempt some isolating steps to see if you can get your accessory to work:
1.) Refresh things by restarting your iPhone: Restart your iPhone - Apple Support
2.) Make sure that your MagSafe Battery Pack is fully charged.
3.) Double check that you're properly attaching your accessory: How to use your MagSafe Battery Pack - Apple Support
4.) Test your MagSafe Battery Pack with a different compatible iPhone. If the issue continues to occur on a different device, you might have to get your accessory evaluated by Apple Support.
If you confirm that your MagSafe Battery Pack isn't working on multiple devices, please reach out to Apple Support. Use this link to reach them: Get Support
Thank you for using Apple Support Communities. Take care.