When you read the data sheet correctly you can see, that the distance between the pins is different for a AA and AAA battery holder. That`s why I was asking if somebody can recommend a holder that fits.
@torfinn said in ATMega328p 8Mhz internal, standalone, mysensors low power problem:
#define MY_REGISTRATION_FEATURE Disabled
This has no effect, the correct approach would be to comment this line:
https://github.com/mysensors/MySensors/blob/master/MyConfig.h#L146