Fig. 2: Basic concepts of the battery.
From: Self-powered smart patch for sweat conductivity monitoring
a Battery model. b Image of a single battery. c Polarisation curves of a single battery with different conductivity of electrolytes. d Resistance of the battery in the ohmic region of the polarization curve as a function of the conductivity of the electrolyte. e Maximum power output of the battery for different electrolyte conductivities
