iPad only powers on when battery is disconnected and reconnected

iPad Mini battery issues.

I have and iPad mini in for a no power or charge issue. Changed out the battery and the only way this device will power on is when I disconnect the battery and plug it back in. Battery voltage is 3.7.

My Drock meter shows voltage as 4.90 and amps as 1.57. I replaced the power button with another working button and still the same thing. The iPad shuts down and won’t power back on unless I disconnect the battery and reconnect it.

The device is charging up to 100 percent but won’t come on. Any thoughts would be appreciated.