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@Gerald
OK... if I connect all the pins and the battery, I plug the USB, I download the code and I unplug the USB, I mesure a consumption of about 10 to 20 uA. The problem now is if I disconnect and reconnect the battery, the consumption rises up to 700uA ! Could you try my first test ? You program the board via USB, you disconnect it, you connect the board on the breadboard and to the battery. In these conditions you should get about 700uA... If so, have you an idea to maintain the consumption at 20uA even if the battery is disconnected and reconnected ?