If they're something like CR2032 then they are rated at less than 1mA, which is a lot less than your micro is demanding. Coin cells are really not suitable as a power source for anything other than memory retention or running RTCs.
If they're something like CR2032 then they are rated at less than 1mA, which is a lot less than your micro is demanding. Coin cells are really not suitable as a power source for anything other than memory retention or running RTCs.