Abstract: An analysis device for a liquid sample comprising: one microfluidic analysis channel made of a wicking material with adequate porosity to allow capillary flow of at least one liquid sample suitable for generating electricity, at least one receiving absorbent region coupled to the microfluidic analysis channel, at least one collecting absorbent region coupled to the microfluidic analysis channel, a cathodic zone coupled to the microfluidic analysis channel, an anodic zone coupled to the microfluidic analysis channel, and at least one detection zone having a sensor, where each receiving absorbent region and each collecting absorbent region are coupled to the microfluidic analysis channel such that when a fluid suitable for generating electricity is deposited in the receiving absorbent region, it flows by capillary action through the microfluidic analysis channel to reach the collecting absorbent region where it is absorbed, and where the sensor interacts with the sample when the latter flows by capillary throug