Hello, I'm Samuel your expert. Welcome to JustAnswer! I'm reviewing your question now, and will post back with your reply ASAP.
Does the battery get hot or does it look damaged?
If at any point you would prefer me to call you directly I can. Other wise I am glad to try and help via chat!
Can you you also check something else for me Beryl? Try plugging in the device...does the area where the cord plugs into the phone have some play or wiggles?