After removing the 1500 mAh "big battery" from the Nokia N71, what you see is not a silver metal plate but a green circuit board. This means we can now have close contact with the circuit board. Nokia's use of such a design is actually understandable. First, the size of mobile phones has significantly decreased compared to before, greatly increasing the requirement for integrated design of the motherboard and other components. Therefore, we can find that most mobile phones today use single-sided surface mount technology, meaning various components are only placed on one side of the PCB. This is also the direction of future development for chip technology in electronic products, and the Nokia E71 clearly adopts this design. Of course, every coin has two sides. The direct exposure of E71's circuit board indeed lacks sufficient protection. Aside from "violent" situations, if it accidentally falls into water, the speed at which moisture enters the inside of the device will greatly increase. This point does indeed need attention.
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