I plan to run an avr like attiny + led strip with 5V supply. The whole thing can draw up to 15A at 5V. To avoid heating problem stepdown and other regulator problem, I've choosen a pack of 4 * 1.2V NiMH battery wich can discharge up to 10C.
The problem is that NiMh after a full charge can be at 1.4V instead of 1.2v. So I will have 5.6V in my system wich is very near the limit for working without problems (reading datasheets).
Do you think I should use a protection for overvoltage pic? which one could fit as I need to pass 15A through it.