An electrical stimulation system for providing pulse stimulation to an area of a living body by way of one or more electrode leads applied to the area, the area including an associated resistance element and an associated capacitance element, comprising: a pulse generating circuit having a controllable output voltage to generate constant voltage pulses to the one or more electrode leads, wherein the corresponding current signal of each constant voltage pulse includes a spike in current followed by an exponential decay to a steady state current value; a controller configured to: estimate the associated resistance element of the area, determine a specified target steady state current value to be applied to the area, control the pulse generating circuit to generate a constant voltage pulse to the one or more electrode leads at a calculated voltage level which achieves the specified target steady state current value to the area, determine a next specified target steady state current value to be applied to the area, and control the pulse generating circuit to generate a next constant voltage pulse to the one or more electrode leads at a next calculated voltage level which achieves the next specified target steady state current value to the area, wherein each generated constant voltage pulse has a faster rise time resulting in a lower required specified target steady state current than when compared to a rectangular constant current pulse or a constant voltage pulse having a slower rise time requiring a higher required specified target steady state current, wherein less energy supply is required to provide the lower required specified target steady state current. a pulse generating circuit having a controllable output voltage to generate constant voltage pulses to the one or more electrode leads, wherein the corresponding current signal of each constant voltage pulse includes a spike in current followed by an exponential decay to a steady state current value; a controller configured to: estimate the associated resistance element of the area, determine a specified target steady state current value to be applied to the area, control the pulse generating circuit to generate a constant voltage pulse to the one or more electrode leads at a calculated voltage level which achieves the specified target steady state current value to the area, determine a next specified target steady state current value to be applied to the area, and control the pulse generating circuit to generate a next constant voltage pulse to the one or more electrode leads at a next calculated voltage level which achieves the next specified target steady state current value to the area, wherein each generated constant voltage pulse has a faster rise time resulting in a lower required specified target steady state current than when compared to a rectangular constant current pulse or a constant voltage pulse having a slower rise time requiring a higher required specified target steady state current, wherein less energy supply is required to provide the lower required specified target steady state current. estimate the associated resistance element of the area, determine a specified target steady state current value to be applied to the area, control the pulse generating circuit to generate a constant voltage pulse to the one or more electrode leads at a calculated voltage level which achieves the specified target steady state current value to the area, determine a next specified target steady state current value to be applied to the area, and control the pulse generating circuit to generate a next constant voltage pulse to the one or more electrode leads at a next calculated voltage level which achieves the next specified target steady state current value to the area, wherein each generated constant voltage pulse has a faster rise time resulting in a lower required specified target steady state current than when compared to a rectangular constant current pulse or a constant voltage pulse having a slower rise time requiring a higher required specified target steady state current, wherein less energy supply is required to provide the lower required specified target steady state current.