Description

The ATtiny85 specs 2.7 to 5.5 input volts giving you lots of options for power:

• 3.7 volt rechargeable lithium ion (18650, 14500, and others)
• 3.7 volt rechargeable lithium ion polymer (various sizes)
• 3–4 rechargeable NiMh from 3.7 to 5.0 volts
• 5.0 volt USB phone battery