Which faction stores will have this magical item? My Nanocircuitry 5 skill is ready. If you don't say Minmatar or all of them I will be raging. *starts looking for a dirt-side monument to shoot at*

It's a bit of a tough call. Sometimes there are opportunities to run out and revive someone while in the middle of a fire fight, other times doing so would just give the enemy extra kills. It's one you learn how to make, but only with experience. I've lost count of the number of times I've successfully battle revived someone, and the immediate advantage of having another gun has won many fights, especially when the enemy has now turned their backs to what they thought was just a dead body. However, doing battle revives requires that you have at least a KIN-012 injector and a repair tool, otherwise there's no chance your patient will survive. It also works better when reviving armour tanked suits as they will have more health when revived, heavy suits even more so. I think you might see more battle revives with the LP exclusive Nanite Injector as it will restore 100% of armour on revive - and for a heavy, that's a lot of health.