Reverse polarity protection

[ScaryMonkeyMan]

So does the DNA 75c chip have reverse polarity protection and would protect the board if one of two parallel batteries was put in the wrong direction?(like in the  I'm curious but don't have a way to test

[Spector NS5 RD]

the board itself has reverse polarity protection BUT not all mods have reverse cell protection (one cell input the opposite the other) built into the sled contacts. there is a difference between reverse polarity protection and reverse cell protection when dealing with dual cell parallel setups. if you accidentally put the one cell in opposite the other, creating a series circuit, it will be a series SHORT circuit (if the mod manufacturer did not implement protection against it) possibly venting one or both of the cells .