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Old 05-05-2012, 02:23 AM
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JSV JSV is offline
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Thank you.

I never thought that batteries would need to be protected against transients in such a low power device.

Diode is certainly not for reverse polarity protection, because if one or both cells are placed the wrong way, the circuit would be opened.

The LCD of the device has an electroluminescent backlight ("Indiglo"), and I just read that these need over 100 volts AC to work. Maybe the "big inductive load" you mentioned is there... Does that makes sense?
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