2. Use the screwdriver to unscrew the 4 screws located at the bottom of the head
to release the bottom plate first. Then unscrew all the screws at the base as
shown. Remove the impeller and pry open the base to expose head inside.
3. Remove out the battery pack to expose the PCBA. To detach the battery
connection wire, press on the clip of the connector to pull it out. NOTE: Wrap the
connector immediately with insulating tape in order to avoid any short circuit
caused by the contact of both wire terminals.
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