Battery Change problem - iPhone in Recovery mode
i followed the step-by-step guide to change the battery of my iPhone 5. I did everything as said but after changing the battery my iPhone can't be switched on again (without connecting the power). I assume something with the battery or battery connection is wrong. After connecting it to a power source it says "connect to iTunes". iTunes however says that it has discovered an iPhone in recovery mode which has to be restored. After I restore it iTunes says that it has to show up on the left but it only says "iPhone detected in recovery mode" after 5 seconds after the restore. Although it has obviously a problem with restoring it doesn't say "recovery error".
I also changed the battery back to the original one but the problem still exist.
Do you have an idea what to do? I don't want to give up that easy and buys new one.
Thanks so far!