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=== Common Problems and Solutions===
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== Common Problems and Solutions==
* All electrical connections in this design are polarized! Pay attention to the positive and negative terminals/signs on PC boards/battery
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* Observe polarity for electrical connections! Pay attention to the positive and negative terminals/signs on PC boards/battery - failure to do so could cause damage.
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* Depending on the metal battery clip style and plastic thickness, the battery positive terminal may not make good contact, without carving some of the plastic away with a knife.
    
== Cost savings==
 
== Cost savings==
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