Weight scale out of power will not be heavy, because there is a voltage regulator circuit inside the weight scale, when it is about to affect the accuracy, it will automatically shut down in advance, and there will be no deviation because of no power, electronic scale is based on the change of current and voltage to calculate the carrying weight.
And the electronic scale tray under the pressure sensitive chip, people stand up, the resistance of the pressure sensitive chip will change with the weight increase or decrease, when