I bought several battery packs each of which I intend to fill with 3 non-rechargeable alkaline metal-encased AA batteries and connecting all the packs in parallel.
All the batteries are of the same type, they also have the same nominal voltage, brand and product name.
I wonder, is there any risk that I should know of? I am mainly concerned about the possibility of one of the batteries failing — can we get a short circuit with the batteries possibly catching or causing fire?
EDIT: I use only new unused batteries. I also used my voltmeter and verified that each battery pack individually provides ~4.5 V.