I’m looking for a circuit that can protect 3-6 Volts AA Batteries when a short-circuit happens. When the short-circuit happens, a second circuit (LED blinking) must be triggered and the batteries must be protected. The goal is that the LED won’t stop blinking until the short-circuit is undone. Could someone give me a hand at selecting cheap suitable options for this application? Efuse, p-channel mosfet, NPN transistor arrange, Ideal diodes or Battery protector CI? The requirement is that this circuit also operates when two 3 Volts AA batteries arre connected in series.

 

What's the maximum load current draw that's not a short-circuit?
At what current do you want the protection circuit to activate?

What type of AA cells are these?

 

I believe I have a solution for your problem, but I need answers to the questions in my #2 post.

 

LED with built-in flasher across a Polyfuse might do it. When the fuse opens the LED would see voltage across the fuse and find ground through the short.

 

What's the maximum load current draw that's not a short-circuit? 0.5 A
At what current do you want the protection circuit to activate? 0.1A

What type of AA cells are these?

Alkaline AA cells

 

You only answered one of my three questions.

 

You only answered one of my three questions.

Maximum load current draw that's not a short-circuit: 0.5 A
Current do you want the protection circuit to activate: 0.1A
Type of AA cells :Alkaline AA cells(x2 1.5 Volts)

 

Okay, but you can't have a load current of 0.5A if the protection kicks in at 0.1A.