Hello & Welcome to Just Answer,
Sorry to hear of any issue you are having with your device.
To help you with this issue, may I ask:
1) The FULL Make & Model Number of the device you are working with?
2) The AGE of the device?
3) Did you replace the battery yourself, or did you "have it done" by someone else?
4) Have you attempted to CHARGE the new battery yet, and if so, for how long and using what charging method?