When kids are learning to make electronic circuits, short circuits are bound to happen. Especially if you have a class full of them. It's a statistical fact. I would like to connect batteries to a breadboard which, when a short circuit happens, don't blow up in their faces. Which batteries would be best suited for such a purpose? I need between 4,5 to 9 volts, so a pack of batteries in series could be considered as well.
I have seen 4,5V LR12 batteries being used for teaching purposes, but I have also heard stories about the (plastic) enclosure starting to melt when shorted. I also don’t like these because the crocodile clips that are often used to connect to the batteries can easily bridge the gap between the terminals.
I tried to decide on a battery by looking at datasheets alone, but that didn’t get me anywhere. A high internal resistance would be favourable, but the battery should also have a relatively high tolerance of heat (to a certain degree). They just don’t state information like that in the datasheet. I was hoping some of you might have some practical experience to help me out.
I have seen 4,5V LR12 batteries being used for teaching purposes, but I have also heard stories about the (plastic) enclosure starting to melt when shorted. I also don’t like these because the crocodile clips that are often used to connect to the batteries can easily bridge the gap between the terminals.
I tried to decide on a battery by looking at datasheets alone, but that didn’t get me anywhere. A high internal resistance would be favourable, but the battery should also have a relatively high tolerance of heat (to a certain degree). They just don’t state information like that in the datasheet. I was hoping some of you might have some practical experience to help me out.