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battery management system
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The board is packed with lots of resistors. What sticks out are these components:
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An ATMEL MEGA 328P Battery Management MCU
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Ablic (formerly Seiko Instruments) S-1142B33H-E6T2U 200 mA LDO regulator
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FL12.000 12 MHz quartz crystal oscillator
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On the flip side we find these:
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Magnachip MDU1931 single n-channel trench MOSFET (x4)
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RS2M rectifier
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