attiny85 on two 3v coin cell batteries?
I've seen specs for attiny85 that say 6v, but most say 5.5v max, so I'm wondering if it's safe to use two 3v coin cell batteries to power them? Such as CR2032 or CR2450. I would only use one, but I need 4.5v for my LEDs. Three AA is too bulky. Thanks.