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Usually the operation is not smooth because the burrs are not trimmed cleanly. Check whether the burrs of the parts are completely cut according to the instructions.
You can contact our online customer service for supplementary matters
1. Check to see if the motor gear and the wheel gear are connected, if not, it will idling and no response
2. Check to see if the motor terminals and the brine fuel cell are assembled correctly
After the assembly is completed, you can use a 1.5V AAA battery or AAA battery to connect the motor terminals to test whether it can work.
After each play, please disassemble the salt water battery immediately, clean the magnesium alloy sheet non-woven fabric and black air electrode with clean water, and dry it separately after cleaning to avoid oxidation under prolonged contact.