Sony Ericsson K770 Working Instruction page 37

Working Instruction, Mechanical
4.1.5 Battery & Battery Cover Assembly
Put the top of the battery against the battery connector.
Press the battery down at the bottom of the battery
compartment.
Align the bottom of the Battery cover assembly with the
guide line of the Flame assembly.
Use your hands to close the Battery cover assembly.
Press the Power key after assembly completed to check up
the operation.
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