In low-power mode even those microcontrollers are using just nA (yes that's nano-Amps). Vs 100's of mA in operation. So the battery life goes from hours to what should be decades.
I'm thinking the battery goes dead because of leakage currents through the rest of the circuits, which were probably not designed to the nA standard.
A solid-state Off switch would also need a good silicon device to cut current consumption at the battery. Which also costs something.
I'm thinking the battery goes dead because of leakage currents through the rest of the circuits, which were probably not designed to the nA standard.
A solid-state Off switch would also need a good silicon device to cut current consumption at the battery. Which also costs something.