Replacement of Remote Controller Battery

Remove emergency key (4).
Remove upper case (1) using a flat-end screwdriver as shown in figure.
Remove printed circuit board (2) from lower case (3).

Fig 1: Removing Upper Case Using Flat-End Screwdriver
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Remove battery (2) using a flat-end screwdriver (1) as shown in figure.

Fig 2: Removing Battery Using Flat-End Screwdriver
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Place battery (lithium disc-type CR 2032 or equivalent) (1) so its "-" terminal faces "-" mark of the printed circuit board (2).

Fig 3: Installing Battery
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Install printed circuit board to lower case and then fit upper case securely.
NOTE: Dispose of the used battery properly according to applicable rules or regulations. Do not dispose of lithium batteries with ordinary household trash.