I have a Galaxy A 9.7. I replaced the battery. It fully charges, and boots up, but when I pull the charging cable the tablet dies. When the system is up I can look at it and it shows the system is fine, the battery is fine and shows 100% charged. It also recognizes that the charging cable is plugged in. Everything seems good, but as I said, pull the cable and it goes black. I replaced the original battery about 2 - 3 years ago. That battery worked well until about two weeks ago when it started to die quickly.