30. You can seperated the Metal cover now

.9. Take out 2 screws which near the Sim card connector..

.8. Seperated the Keypad successfully..

.7. Pull and take out the keypad..

.6. Take 2nd screw inside and near the battery connector..

.5. Take 1st screw inside and near the battery connector..

Battery Replacement ( for 8.4" version, BT-000393-00 ) Replacement for Zebra ET51, ET56P/N: BT-00039..

25. Take out 1st screw on the metal cover..

30. You can seperated the Metal cover now..