Answer to "Replaced Battery, Constantly Reboots and unchanging battery percent"I fixed my issue by using Electric Contact Spray. It seems that either phone’s contact plug or most probably battery’s jack oxidized and didn’t make perfect contact. After I sprayed these 2 jacks it worked like charm.
Answer to "Replaced Battery, Constantly Reboots and unchanging battery percent"After I replaced my battery my iPhone kept restarting every 2-3 minutes, not charging more than 13% etc. I thought that the battery is damaged, but the problem was that the contact from battery was a bit oxidezed. A little contact spray helped me solve the problem and the phone works now perfectly.