Not quite sure what you mean.
There's no polarity issue for anything other than mini-tamiya fitted guns- you can thank Tokyo Marui for the issue originally. But Mini-Tamiyas can be de-pinned from their plastic housing and swapped over if needed.
There are established standards for polarity wiring on both Deans and XT30/60. It's even moulded into the plastic on many plugs telling you where to solder each wire. Guns manufactured with deans fitted from the factory follow that standard, along with LiPos with Deans pre-fitted. The only issue is if someone retrofits Deans themselves and cocks up the polarity when soldering the wires on.
So
this will work perfectly to charge an Airsoft LiPo fitted with Deans using an S65 charger. It does not have to be Airsoft specific at all.